20941960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1$

素因数の和:167

約数の個数: 128

約数和(自身を含む): 56609280

約数和(自身を除く): 35667320

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 23, 26, 34, 40, 46, 52, 65, 68, 85, 92, 103, 104, 115, 130, 136, 170, 184, 206, 221, 230, 260, 299, 340, 391, 412, 442, 460, 515, 520, 598, 680, 782, 824, 884, 920, 1030, 1105, 1196, 1339, 1495, 1564, 1751, 1768, 1955, 2060, 2210, 2369, 2392, 2678, 2990, 3128, 3502, 3910, 4120, 4420, 4738, 5083, 5356, 5980, 6695, 7004, 7820, 8755, 8840, 9476, 10166, 10712, 11845, 11960, 13390, 14008, 15640, 17510, 18952, 20332, 22763, 23690, 25415, 26780, 30797, 35020, 40273, 40664, 45526, 47380, 50830, 53560, 61594, 70040, 80546, 91052, 94760, 101660, 113815, 123188, 153985, 161092, 182104, 201365, 203320, 227630, 246376, 307970, 322184, 402730, 455260, 523549, 615940, 805460, 910520, 1047098, 1231880, 1610920, 2094196, 2617745, 4188392, 5235490, 10470980, 20941960]

約数ペア:

[(1, 20941960), (2, 10470980), (4, 5235490), (5, 4188392), (8, 2617745), (10, 2094196), (13, 1610920), (17, 1231880), (20, 1047098), (23, 910520), (26, 805460), (34, 615940), (40, 523549), (46, 455260), (52, 402730), (65, 322184), (68, 307970), (85, 246376), (92, 227630), (103, 203320), (104, 201365), (115, 182104), (130, 161092), (136, 153985), (170, 123188), (184, 113815), (206, 101660), (221, 94760), (230, 91052), (260, 80546), (299, 70040), (340, 61594), (391, 53560), (412, 50830), (442, 47380), (460, 45526), (515, 40664), (520, 40273), (598, 35020), (680, 30797), (782, 26780), (824, 25415), (884, 23690), (920, 22763), (1030, 20332), (1105, 18952), (1196, 17510), (1339, 15640), (1495, 14008), (1564, 13390), (1751, 11960), (1768, 11845), (1955, 10712), (2060, 10166), (2210, 9476), (2369, 8840), (2392, 8755), (2678, 7820), (2990, 7004), (3128, 6695), (3502, 5980), (3910, 5356), (4120, 5083), (4420, 4738)]