20405970

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{163}}^1$

素因数の和:296

約数の個数: 96

約数和(自身を含む): 58024512

約数和(自身を除く): 37618542

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 107, 117, 130, 163, 195, 214, 234, 321, 326, 390, 489, 535, 585, 642, 815, 963, 978, 1070, 1170, 1391, 1467, 1605, 1630, 1926, 2119, 2445, 2782, 2934, 3210, 4173, 4238, 4815, 4890, 6357, 6955, 7335, 8346, 9630, 10595, 12519, 12714, 13910, 14670, 17441, 19071, 20865, 21190, 25038, 31785, 34882, 38142, 41730, 52323, 62595, 63570, 87205, 95355, 104646, 125190, 156969, 174410, 190710, 226733, 261615, 313938, 453466, 523230, 680199, 784845, 1133665, 1360398, 1569690, 2040597, 2267330, 3400995, 4081194, 6801990, 10202985, 20405970]

約数ペア:

[(1, 20405970), (2, 10202985), (3, 6801990), (5, 4081194), (6, 3400995), (9, 2267330), (10, 2040597), (13, 1569690), (15, 1360398), (18, 1133665), (26, 784845), (30, 680199), (39, 523230), (45, 453466), (65, 313938), (78, 261615), (90, 226733), (107, 190710), (117, 174410), (130, 156969), (163, 125190), (195, 104646), (214, 95355), (234, 87205), (321, 63570), (326, 62595), (390, 52323), (489, 41730), (535, 38142), (585, 34882), (642, 31785), (815, 25038), (963, 21190), (978, 20865), (1070, 19071), (1170, 17441), (1391, 14670), (1467, 13910), (1605, 12714), (1630, 12519), (1926, 10595), (2119, 9630), (2445, 8346), (2782, 7335), (2934, 6955), (3210, 6357), (4173, 4890), (4238, 4815)]