645871920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{20543}}^1$

素因数の和:20690

約数の個数: 80

約数和(自身を含む): 2017585152

約数和(自身を除く): 1371713232

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 131, 240, 262, 393, 524, 655, 786, 1048, 1310, 1572, 1965, 2096, 2620, 3144, 3930, 5240, 6288, 7860, 10480, 15720, 20543, 31440, 41086, 61629, 82172, 102715, 123258, 164344, 205430, 246516, 308145, 328688, 410860, 493032, 616290, 821720, 986064, 1232580, 1643440, 2465160, 2691133, 4930320, 5382266, 8073399, 10764532, 13455665, 16146798, 21529064, 26911330, 32293596, 40366995, 43058128, 53822660, 64587192, 80733990, 107645320, 129174384, 161467980, 215290640, 322935960, 645871920]

約数ペア:

[(1, 645871920), (2, 322935960), (3, 215290640), (4, 161467980), (5, 129174384), (6, 107645320), (8, 80733990), (10, 64587192), (12, 53822660), (15, 43058128), (16, 40366995), (20, 32293596), (24, 26911330), (30, 21529064), (40, 16146798), (48, 13455665), (60, 10764532), (80, 8073399), (120, 5382266), (131, 4930320), (240, 2691133), (262, 2465160), (393, 1643440), (524, 1232580), (655, 986064), (786, 821720), (1048, 616290), (1310, 493032), (1572, 410860), (1965, 328688), (2096, 308145), (2620, 246516), (3144, 205430), (3930, 164344), (5240, 123258), (6288, 102715), (7860, 82172), (10480, 61629), (15720, 41086), (20543, 31440)]