20403720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{157}}^1$

素因数の和:212

約数の個数: 144

約数和(自身を含む): 70431660

約数和(自身を除く): 50027940

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 30, 36, 38, 40, 45, 57, 60, 72, 76, 90, 95, 114, 120, 152, 157, 171, 180, 190, 228, 285, 314, 342, 360, 361, 380, 456, 471, 570, 628, 684, 722, 760, 785, 855, 942, 1083, 1140, 1256, 1368, 1413, 1444, 1570, 1710, 1805, 1884, 2166, 2280, 2355, 2826, 2888, 2983, 3140, 3249, 3420, 3610, 3768, 4332, 4710, 5415, 5652, 5966, 6280, 6498, 6840, 7065, 7220, 8664, 8949, 9420, 10830, 11304, 11932, 12996, 14130, 14440, 14915, 16245, 17898, 18840, 21660, 23864, 25992, 26847, 28260, 29830, 32490, 35796, 43320, 44745, 53694, 56520, 56677, 59660, 64980, 71592, 89490, 107388, 113354, 119320, 129960, 134235, 170031, 178980, 214776, 226708, 268470, 283385, 340062, 357960, 453416, 510093, 536940, 566770, 680124, 850155, 1020186, 1073880, 1133540, 1360248, 1700310, 2040372, 2267080, 2550465, 3400620, 4080744, 5100930, 6801240, 10201860, 20403720]

約数ペア:

[(1, 20403720), (2, 10201860), (3, 6801240), (4, 5100930), (5, 4080744), (6, 3400620), (8, 2550465), (9, 2267080), (10, 2040372), (12, 1700310), (15, 1360248), (18, 1133540), (19, 1073880), (20, 1020186), (24, 850155), (30, 680124), (36, 566770), (38, 536940), (40, 510093), (45, 453416), (57, 357960), (60, 340062), (72, 283385), (76, 268470), (90, 226708), (95, 214776), (114, 178980), (120, 170031), (152, 134235), (157, 129960), (171, 119320), (180, 113354), (190, 107388), (228, 89490), (285, 71592), (314, 64980), (342, 59660), (360, 56677), (361, 56520), (380, 53694), (456, 44745), (471, 43320), (570, 35796), (628, 32490), (684, 29830), (722, 28260), (760, 26847), (785, 25992), (855, 23864), (942, 21660), (1083, 18840), (1140, 17898), (1256, 16245), (1368, 14915), (1413, 14440), (1444, 14130), (1570, 12996), (1710, 11932), (1805, 11304), (1884, 10830), (2166, 9420), (2280, 8949), (2355, 8664), (2826, 7220), (2888, 7065), (2983, 6840), (3140, 6498), (3249, 6280), (3420, 5966), (3610, 5652), (3768, 5415), (4332, 4710)]