20997204

素因数分解:

$2^2\times 3^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 53510688

約数和(自身を除く): 32513484

約数列:

[1, 2, 3, 4, 6, 12, 19, 37, 38, 57, 74, 76, 111, 114, 131, 148, 222, 228, 262, 361, 393, 444, 524, 703, 722, 786, 1083, 1406, 1444, 1572, 2109, 2166, 2489, 2812, 4218, 4332, 4847, 4978, 7467, 8436, 9694, 9956, 13357, 14541, 14934, 19388, 26714, 29082, 29868, 40071, 47291, 53428, 58164, 80142, 92093, 94582, 141873, 160284, 184186, 189164, 276279, 283746, 368372, 552558, 567492, 1105116, 1749767, 3499534, 5249301, 6999068, 10498602, 20997204]

約数ペア:

[(1, 20997204), (2, 10498602), (3, 6999068), (4, 5249301), (6, 3499534), (12, 1749767), (19, 1105116), (37, 567492), (38, 552558), (57, 368372), (74, 283746), (76, 276279), (111, 189164), (114, 184186), (131, 160284), (148, 141873), (222, 94582), (228, 92093), (262, 80142), (361, 58164), (393, 53428), (444, 47291), (524, 40071), (703, 29868), (722, 29082), (786, 26714), (1083, 19388), (1406, 14934), (1444, 14541), (1572, 13357), (2109, 9956), (2166, 9694), (2489, 8436), (2812, 7467), (4218, 4978), (4332, 4847)]