18742672

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{359}}^1$

素因数の和:631

約数の個数: 40

約数和(自身を含む): 39372480

約数和(自身を除く): 20629808

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 251, 359, 502, 718, 1004, 1436, 2008, 2872, 3263, 4016, 4667, 5744, 6526, 9334, 13052, 18668, 26104, 37336, 52208, 74672, 90109, 180218, 360436, 720872, 1171417, 1441744, 2342834, 4685668, 9371336, 18742672]

約数ペア:

[(1, 18742672), (2, 9371336), (4, 4685668), (8, 2342834), (13, 1441744), (16, 1171417), (26, 720872), (52, 360436), (104, 180218), (208, 90109), (251, 74672), (359, 52208), (502, 37336), (718, 26104), (1004, 18668), (1436, 13052), (2008, 9334), (2872, 6526), (3263, 5744), (4016, 4667)]