20847840

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{257}}^1$

素因数の和:301

約数の個数: 144

約数和(自身を含む): 71387568

約数和(自身を除く): 50539728

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 65, 78, 80, 96, 104, 120, 130, 156, 160, 169, 195, 208, 240, 257, 260, 312, 338, 390, 416, 480, 507, 514, 520, 624, 676, 771, 780, 845, 1014, 1028, 1040, 1248, 1285, 1352, 1542, 1560, 1690, 2028, 2056, 2080, 2535, 2570, 2704, 3084, 3120, 3341, 3380, 3855, 4056, 4112, 5070, 5140, 5408, 6168, 6240, 6682, 6760, 7710, 8112, 8224, 10023, 10140, 10280, 12336, 13364, 13520, 15420, 16224, 16705, 20046, 20280, 20560, 24672, 26728, 27040, 30840, 33410, 40092, 40560, 41120, 43433, 50115, 53456, 61680, 66820, 80184, 81120, 86866, 100230, 106912, 123360, 130299, 133640, 160368, 173732, 200460, 217165, 260598, 267280, 320736, 347464, 400920, 434330, 521196, 534560, 651495, 694928, 801840, 868660, 1042392, 1302990, 1389856, 1603680, 1737320, 2084784, 2605980, 3474640, 4169568, 5211960, 6949280, 10423920, 20847840]

約数ペア:

[(1, 20847840), (2, 10423920), (3, 6949280), (4, 5211960), (5, 4169568), (6, 3474640), (8, 2605980), (10, 2084784), (12, 1737320), (13, 1603680), (15, 1389856), (16, 1302990), (20, 1042392), (24, 868660), (26, 801840), (30, 694928), (32, 651495), (39, 534560), (40, 521196), (48, 434330), (52, 400920), (60, 347464), (65, 320736), (78, 267280), (80, 260598), (96, 217165), (104, 200460), (120, 173732), (130, 160368), (156, 133640), (160, 130299), (169, 123360), (195, 106912), (208, 100230), (240, 86866), (257, 81120), (260, 80184), (312, 66820), (338, 61680), (390, 53456), (416, 50115), (480, 43433), (507, 41120), (514, 40560), (520, 40092), (624, 33410), (676, 30840), (771, 27040), (780, 26728), (845, 24672), (1014, 20560), (1028, 20280), (1040, 20046), (1248, 16705), (1285, 16224), (1352, 15420), (1542, 13520), (1560, 13364), (1690, 12336), (2028, 10280), (2056, 10140), (2080, 10023), (2535, 8224), (2570, 8112), (2704, 7710), (3084, 6760), (3120, 6682), (3341, 6240), (3380, 6168), (3855, 5408), (4056, 5140), (4112, 5070)]