19874720

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4007}}^1$

素因数の和:4053

約数の個数: 48

約数和(自身を含む): 48480768

約数和(自身を除く): 28606048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4007, 4960, 8014, 16028, 20035, 32056, 40070, 64112, 80140, 124217, 128224, 160280, 248434, 320560, 496868, 621085, 641120, 993736, 1242170, 1987472, 2484340, 3974944, 4968680, 9937360, 19874720]

約数ペア:

[(1, 19874720), (2, 9937360), (4, 4968680), (5, 3974944), (8, 2484340), (10, 1987472), (16, 1242170), (20, 993736), (31, 641120), (32, 621085), (40, 496868), (62, 320560), (80, 248434), (124, 160280), (155, 128224), (160, 124217), (248, 80140), (310, 64112), (496, 40070), (620, 32056), (992, 20035), (1240, 16028), (2480, 8014), (4007, 4960)]