20465550

素因数分解:

$2^1\times 3^2\times 5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:187

約数の個数: 144

約数和(自身を含む): 64415520

約数和(自身を除く): 43949970

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 25, 30, 35, 42, 45, 50, 63, 70, 73, 75, 89, 90, 105, 126, 146, 150, 175, 178, 210, 219, 225, 267, 315, 350, 365, 438, 445, 450, 511, 525, 534, 623, 630, 657, 730, 801, 890, 1022, 1050, 1095, 1246, 1314, 1335, 1533, 1575, 1602, 1825, 1869, 2190, 2225, 2555, 2670, 3066, 3115, 3150, 3285, 3650, 3738, 4005, 4450, 4599, 5110, 5475, 5607, 6230, 6497, 6570, 6675, 7665, 8010, 9198, 9345, 10950, 11214, 12775, 12994, 13350, 15330, 15575, 16425, 18690, 19491, 20025, 22995, 25550, 28035, 31150, 32485, 32850, 38325, 38982, 40050, 45479, 45990, 46725, 56070, 58473, 64970, 76650, 90958, 93450, 97455, 114975, 116946, 136437, 140175, 162425, 194910, 227395, 229950, 272874, 280350, 292365, 324850, 409311, 454790, 487275, 584730, 682185, 818622, 974550, 1136975, 1364370, 1461825, 2046555, 2273950, 2923650, 3410925, 4093110, 6821850, 10232775, 20465550]

約数ペア:

[(1, 20465550), (2, 10232775), (3, 6821850), (5, 4093110), (6, 3410925), (7, 2923650), (9, 2273950), (10, 2046555), (14, 1461825), (15, 1364370), (18, 1136975), (21, 974550), (25, 818622), (30, 682185), (35, 584730), (42, 487275), (45, 454790), (50, 409311), (63, 324850), (70, 292365), (73, 280350), (75, 272874), (89, 229950), (90, 227395), (105, 194910), (126, 162425), (146, 140175), (150, 136437), (175, 116946), (178, 114975), (210, 97455), (219, 93450), (225, 90958), (267, 76650), (315, 64970), (350, 58473), (365, 56070), (438, 46725), (445, 45990), (450, 45479), (511, 40050), (525, 38982), (534, 38325), (623, 32850), (630, 32485), (657, 31150), (730, 28035), (801, 25550), (890, 22995), (1022, 20025), (1050, 19491), (1095, 18690), (1246, 16425), (1314, 15575), (1335, 15330), (1533, 13350), (1575, 12994), (1602, 12775), (1825, 11214), (1869, 10950), (2190, 9345), (2225, 9198), (2555, 8010), (2670, 7665), (3066, 6675), (3115, 6570), (3150, 6497), (3285, 6230), (3650, 5607), (3738, 5475), (4005, 5110), (4450, 4599)]