21218880

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:105

約数の個数: 168

約数和(自身を含む): 72639936

約数和(自身を除く): 51421056

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 31, 32, 40, 46, 48, 60, 62, 64, 69, 80, 92, 93, 96, 115, 120, 124, 138, 155, 160, 184, 186, 192, 230, 240, 248, 276, 310, 320, 345, 368, 372, 460, 465, 480, 496, 552, 620, 690, 713, 736, 744, 920, 930, 960, 961, 992, 1104, 1240, 1380, 1426, 1472, 1488, 1840, 1860, 1922, 1984, 2139, 2208, 2480, 2760, 2852, 2883, 2976, 3565, 3680, 3720, 3844, 4278, 4416, 4805, 4960, 5520, 5704, 5766, 5952, 7130, 7360, 7440, 7688, 8556, 9610, 9920, 10695, 11040, 11408, 11532, 14260, 14415, 14880, 15376, 17112, 19220, 21390, 22080, 22103, 22816, 23064, 28520, 28830, 29760, 30752, 34224, 38440, 42780, 44206, 45632, 46128, 57040, 57660, 61504, 66309, 68448, 76880, 85560, 88412, 92256, 110515, 114080, 115320, 132618, 136896, 153760, 171120, 176824, 184512, 221030, 228160, 230640, 265236, 307520, 331545, 342240, 353648, 442060, 461280, 530472, 663090, 684480, 707296, 884120, 922560, 1060944, 1326180, 1414592, 1768240, 2121888, 2652360, 3536480, 4243776, 5304720, 7072960, 10609440, 21218880]

約数ペア:

[(1, 21218880), (2, 10609440), (3, 7072960), (4, 5304720), (5, 4243776), (6, 3536480), (8, 2652360), (10, 2121888), (12, 1768240), (15, 1414592), (16, 1326180), (20, 1060944), (23, 922560), (24, 884120), (30, 707296), (31, 684480), (32, 663090), (40, 530472), (46, 461280), (48, 442060), (60, 353648), (62, 342240), (64, 331545), (69, 307520), (80, 265236), (92, 230640), (93, 228160), (96, 221030), (115, 184512), (120, 176824), (124, 171120), (138, 153760), (155, 136896), (160, 132618), (184, 115320), (186, 114080), (192, 110515), (230, 92256), (240, 88412), (248, 85560), (276, 76880), (310, 68448), (320, 66309), (345, 61504), (368, 57660), (372, 57040), (460, 46128), (465, 45632), (480, 44206), (496, 42780), (552, 38440), (620, 34224), (690, 30752), (713, 29760), (736, 28830), (744, 28520), (920, 23064), (930, 22816), (960, 22103), (961, 22080), (992, 21390), (1104, 19220), (1240, 17112), (1380, 15376), (1426, 14880), (1472, 14415), (1488, 14260), (1840, 11532), (1860, 11408), (1922, 11040), (1984, 10695), (2139, 9920), (2208, 9610), (2480, 8556), (2760, 7688), (2852, 7440), (2883, 7360), (2976, 7130), (3565, 5952), (3680, 5766), (3720, 5704), (3844, 5520), (4278, 4960), (4416, 4805)]