20445840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{389}}^1$

素因数の和:481

約数の個数: 120

約数和(自身を含む): 69783480

約数和(自身を除く): 49337640

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 73, 80, 90, 120, 144, 146, 180, 219, 240, 292, 360, 365, 389, 438, 584, 657, 720, 730, 778, 876, 1095, 1167, 1168, 1314, 1460, 1556, 1752, 1945, 2190, 2334, 2628, 2920, 3112, 3285, 3501, 3504, 3890, 4380, 4668, 5256, 5835, 5840, 6224, 6570, 7002, 7780, 8760, 9336, 10512, 11670, 13140, 14004, 15560, 17505, 17520, 18672, 23340, 26280, 28008, 28397, 31120, 35010, 46680, 52560, 56016, 56794, 70020, 85191, 93360, 113588, 140040, 141985, 170382, 227176, 255573, 280080, 283970, 340764, 425955, 454352, 511146, 567940, 681528, 851910, 1022292, 1135880, 1277865, 1363056, 1703820, 2044584, 2271760, 2555730, 3407640, 4089168, 5111460, 6815280, 10222920, 20445840]

約数ペア:

[(1, 20445840), (2, 10222920), (3, 6815280), (4, 5111460), (5, 4089168), (6, 3407640), (8, 2555730), (9, 2271760), (10, 2044584), (12, 1703820), (15, 1363056), (16, 1277865), (18, 1135880), (20, 1022292), (24, 851910), (30, 681528), (36, 567940), (40, 511146), (45, 454352), (48, 425955), (60, 340764), (72, 283970), (73, 280080), (80, 255573), (90, 227176), (120, 170382), (144, 141985), (146, 140040), (180, 113588), (219, 93360), (240, 85191), (292, 70020), (360, 56794), (365, 56016), (389, 52560), (438, 46680), (584, 35010), (657, 31120), (720, 28397), (730, 28008), (778, 26280), (876, 23340), (1095, 18672), (1167, 17520), (1168, 17505), (1314, 15560), (1460, 14004), (1556, 13140), (1752, 11670), (1945, 10512), (2190, 9336), (2334, 8760), (2628, 7780), (2920, 7002), (3112, 6570), (3285, 6224), (3501, 5840), (3504, 5835), (3890, 5256), (4380, 4668)]