20780280

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{271}}^1$

素因数の和:362

約数の個数: 128

約数和(自身を含む): 70502400

約数和(自身を除く): 49722120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 71, 72, 90, 108, 120, 135, 142, 180, 213, 216, 270, 271, 284, 355, 360, 426, 540, 542, 568, 639, 710, 813, 852, 1065, 1080, 1084, 1278, 1355, 1420, 1626, 1704, 1917, 2130, 2168, 2439, 2556, 2710, 2840, 3195, 3252, 3834, 4065, 4260, 4878, 5112, 5420, 6390, 6504, 7317, 7668, 8130, 8520, 9585, 9756, 10840, 12195, 12780, 14634, 15336, 16260, 19170, 19241, 19512, 24390, 25560, 29268, 32520, 36585, 38340, 38482, 48780, 57723, 58536, 73170, 76680, 76964, 96205, 97560, 115446, 146340, 153928, 173169, 192410, 230892, 288615, 292680, 346338, 384820, 461784, 519507, 577230, 692676, 769640, 865845, 1039014, 1154460, 1385352, 1731690, 2078028, 2308920, 2597535, 3463380, 4156056, 5195070, 6926760, 10390140, 20780280]

約数ペア:

[(1, 20780280), (2, 10390140), (3, 6926760), (4, 5195070), (5, 4156056), (6, 3463380), (8, 2597535), (9, 2308920), (10, 2078028), (12, 1731690), (15, 1385352), (18, 1154460), (20, 1039014), (24, 865845), (27, 769640), (30, 692676), (36, 577230), (40, 519507), (45, 461784), (54, 384820), (60, 346338), (71, 292680), (72, 288615), (90, 230892), (108, 192410), (120, 173169), (135, 153928), (142, 146340), (180, 115446), (213, 97560), (216, 96205), (270, 76964), (271, 76680), (284, 73170), (355, 58536), (360, 57723), (426, 48780), (540, 38482), (542, 38340), (568, 36585), (639, 32520), (710, 29268), (813, 25560), (852, 24390), (1065, 19512), (1080, 19241), (1084, 19170), (1278, 16260), (1355, 15336), (1420, 14634), (1626, 12780), (1704, 12195), (1917, 10840), (2130, 9756), (2168, 9585), (2439, 8520), (2556, 8130), (2710, 7668), (2840, 7317), (3195, 6504), (3252, 6390), (3834, 5420), (4065, 5112), (4260, 4878)]