20365720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{211}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 48844800

約数和(自身を除く): 28479080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 127, 152, 190, 211, 254, 380, 422, 508, 635, 760, 844, 1016, 1055, 1270, 1688, 2110, 2413, 2540, 4009, 4220, 4826, 5080, 8018, 8440, 9652, 12065, 16036, 19304, 20045, 24130, 26797, 32072, 40090, 48260, 53594, 80180, 96520, 107188, 133985, 160360, 214376, 267970, 509143, 535940, 1018286, 1071880, 2036572, 2545715, 4073144, 5091430, 10182860, 20365720]

約数ペア:

[(1, 20365720), (2, 10182860), (4, 5091430), (5, 4073144), (8, 2545715), (10, 2036572), (19, 1071880), (20, 1018286), (38, 535940), (40, 509143), (76, 267970), (95, 214376), (127, 160360), (152, 133985), (190, 107188), (211, 96520), (254, 80180), (380, 53594), (422, 48260), (508, 40090), (635, 32072), (760, 26797), (844, 24130), (1016, 20045), (1055, 19304), (1270, 16036), (1688, 12065), (2110, 9652), (2413, 8440), (2540, 8018), (4009, 5080), (4220, 4826)]