21447040

素因数分解:

$2^7\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:120

約数の個数: 128

約数和(自身を含む): 56401920

約数和(自身を除く): 34954880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 32, 40, 46, 47, 62, 64, 80, 92, 94, 115, 124, 128, 155, 160, 184, 188, 230, 235, 248, 310, 320, 368, 376, 460, 470, 496, 620, 640, 713, 736, 752, 920, 940, 992, 1081, 1240, 1426, 1457, 1472, 1504, 1840, 1880, 1984, 2162, 2480, 2852, 2914, 2944, 3008, 3565, 3680, 3760, 3968, 4324, 4960, 5405, 5704, 5828, 6016, 7130, 7285, 7360, 7520, 8648, 9920, 10810, 11408, 11656, 14260, 14570, 14720, 15040, 17296, 19840, 21620, 22816, 23312, 28520, 29140, 30080, 33511, 34592, 43240, 45632, 46624, 57040, 58280, 67022, 69184, 86480, 91264, 93248, 114080, 116560, 134044, 138368, 167555, 172960, 186496, 228160, 233120, 268088, 335110, 345920, 456320, 466240, 536176, 670220, 691840, 932480, 1072352, 1340440, 2144704, 2680880, 4289408, 5361760, 10723520, 21447040]

約数ペア:

[(1, 21447040), (2, 10723520), (4, 5361760), (5, 4289408), (8, 2680880), (10, 2144704), (16, 1340440), (20, 1072352), (23, 932480), (31, 691840), (32, 670220), (40, 536176), (46, 466240), (47, 456320), (62, 345920), (64, 335110), (80, 268088), (92, 233120), (94, 228160), (115, 186496), (124, 172960), (128, 167555), (155, 138368), (160, 134044), (184, 116560), (188, 114080), (230, 93248), (235, 91264), (248, 86480), (310, 69184), (320, 67022), (368, 58280), (376, 57040), (460, 46624), (470, 45632), (496, 43240), (620, 34592), (640, 33511), (713, 30080), (736, 29140), (752, 28520), (920, 23312), (940, 22816), (992, 21620), (1081, 19840), (1240, 17296), (1426, 15040), (1457, 14720), (1472, 14570), (1504, 14260), (1840, 11656), (1880, 11408), (1984, 10810), (2162, 9920), (2480, 8648), (2852, 7520), (2914, 7360), (2944, 7285), (3008, 7130), (3565, 6016), (3680, 5828), (3760, 5704), (3968, 5405), (4324, 4960)]