20545460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4159}}^1$

素因数の和:4200

約数の個数: 48

約数和(自身を含む): 48921600

約数和(自身を除く): 28376140

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4159, 4940, 8318, 16636, 20795, 41590, 54067, 79021, 83180, 108134, 158042, 216268, 270335, 316084, 395105, 540670, 790210, 1027273, 1081340, 1580420, 2054546, 4109092, 5136365, 10272730, 20545460]

約数ペア:

[(1, 20545460), (2, 10272730), (4, 5136365), (5, 4109092), (10, 2054546), (13, 1580420), (19, 1081340), (20, 1027273), (26, 790210), (38, 540670), (52, 395105), (65, 316084), (76, 270335), (95, 216268), (130, 158042), (190, 108134), (247, 83180), (260, 79021), (380, 54067), (494, 41590), (988, 20795), (1235, 16636), (2470, 8318), (4159, 4940)]