638353404

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{31721}}^1$

素因数の和:31787

約数の個数: 72

約数和(自身を含む): 1778208432

約数和(自身を除く): 1139855028

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 43, 52, 78, 86, 117, 129, 156, 172, 234, 258, 387, 468, 516, 559, 774, 1118, 1548, 1677, 2236, 3354, 5031, 6708, 10062, 20124, 31721, 63442, 95163, 126884, 190326, 285489, 380652, 412373, 570978, 824746, 1141956, 1237119, 1364003, 1649492, 2474238, 2728006, 3711357, 4092009, 4948476, 5456012, 7422714, 8184018, 12276027, 14845428, 16368036, 17732039, 24552054, 35464078, 49104108, 53196117, 70928156, 106392234, 159588351, 212784468, 319176702, 638353404]

約数ペア:

[(1, 638353404), (2, 319176702), (3, 212784468), (4, 159588351), (6, 106392234), (9, 70928156), (12, 53196117), (13, 49104108), (18, 35464078), (26, 24552054), (36, 17732039), (39, 16368036), (43, 14845428), (52, 12276027), (78, 8184018), (86, 7422714), (117, 5456012), (129, 4948476), (156, 4092009), (172, 3711357), (234, 2728006), (258, 2474238), (387, 1649492), (468, 1364003), (516, 1237119), (559, 1141956), (774, 824746), (1118, 570978), (1548, 412373), (1677, 380652), (2236, 285489), (3354, 190326), (5031, 126884), (6708, 95163), (10062, 63442), (20124, 31721)]