20999760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{5147}}^1$

素因数の和:5180

約数の個数: 80

約数和(自身を含む): 68942016

約数和(自身を除く): 47942256

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 5147, 10294, 15441, 20588, 25735, 30882, 41176, 51470, 61764, 77205, 82352, 87499, 102940, 123528, 154410, 174998, 205880, 247056, 262497, 308820, 349996, 411760, 437495, 524994, 617640, 699992, 874990, 1049988, 1235280, 1312485, 1399984, 1749980, 2099976, 2624970, 3499960, 4199952, 5249940, 6999920, 10499880, 20999760]

約数ペア:

[(1, 20999760), (2, 10499880), (3, 6999920), (4, 5249940), (5, 4199952), (6, 3499960), (8, 2624970), (10, 2099976), (12, 1749980), (15, 1399984), (16, 1312485), (17, 1235280), (20, 1049988), (24, 874990), (30, 699992), (34, 617640), (40, 524994), (48, 437495), (51, 411760), (60, 349996), (68, 308820), (80, 262497), (85, 247056), (102, 205880), (120, 174998), (136, 154410), (170, 123528), (204, 102940), (240, 87499), (255, 82352), (272, 77205), (340, 61764), (408, 51470), (510, 41176), (680, 30882), (816, 25735), (1020, 20588), (1360, 15441), (2040, 10294), (4080, 5147)]