21821280

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{269}}^1$

素因数の和:313

約数の個数: 144

約数和(自身を含む): 74707920

約数和(自身を除く): 52886640

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, 260, 269, 312, 338, 390, 416, 480, 507, 520, 538, 624, 676, 780, 807, 845, 1014, 1040, 1076, 1248, 1345, 1352, 1560, 1614, 1690, 2028, 2080, 2152, 2535, 2690, 2704, 3120, 3228, 3380, 3497, 4035, 4056, 4304, 5070, 5380, 5408, 6240, 6456, 6760, 6994, 8070, 8112, 8608, 10140, 10491, 10760, 12912, 13520, 13988, 16140, 16224, 17485, 20280, 20982, 21520, 25824, 27040, 27976, 32280, 34970, 40560, 41964, 43040, 45461, 52455, 55952, 64560, 69940, 81120, 83928, 90922, 104910, 111904, 129120, 136383, 139880, 167856, 181844, 209820, 227305, 272766, 279760, 335712, 363688, 419640, 454610, 545532, 559520, 681915, 727376, 839280, 909220, 1091064, 1363830, 1454752, 1678560, 1818440, 2182128, 2727660, 3636880, 4364256, 5455320, 7273760, 10910640, 21821280]

約数ペア:

[(1, 21821280), (2, 10910640), (3, 7273760), (4, 5455320), (5, 4364256), (6, 3636880), (8, 2727660), (10, 2182128), (12, 1818440), (13, 1678560), (15, 1454752), (16, 1363830), (20, 1091064), (24, 909220), (26, 839280), (30, 727376), (32, 681915), (39, 559520), (40, 545532), (48, 454610), (52, 419640), (60, 363688), (65, 335712), (78, 279760), (80, 272766), (96, 227305), (104, 209820), (120, 181844), (130, 167856), (156, 139880), (160, 136383), (169, 129120), (195, 111904), (208, 104910), (240, 90922), (260, 83928), (269, 81120), (312, 69940), (338, 64560), (390, 55952), (416, 52455), (480, 45461), (507, 43040), (520, 41964), (538, 40560), (624, 34970), (676, 32280), (780, 27976), (807, 27040), (845, 25824), (1014, 21520), (1040, 20982), (1076, 20280), (1248, 17485), (1345, 16224), (1352, 16140), (1560, 13988), (1614, 13520), (1690, 12912), (2028, 10760), (2080, 10491), (2152, 10140), (2535, 8608), (2690, 8112), (2704, 8070), (3120, 6994), (3228, 6760), (3380, 6456), (3497, 6240), (4035, 5408), (4056, 5380), (4304, 5070)]