397677440

素因数分解:

$2^7\times 5^1\times {\mathrm{621371}}^1$

素因数の和:621390

約数の個数: 32

約数和(自身を含む): 950699160

約数和(自身を除く): 553021720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 621371, 1242742, 2485484, 3106855, 4970968, 6213710, 9941936, 12427420, 19883872, 24854840, 39767744, 49709680, 79535488, 99419360, 198838720, 397677440]

約数ペア:

[(1, 397677440), (2, 198838720), (4, 99419360), (5, 79535488), (8, 49709680), (10, 39767744), (16, 24854840), (20, 19883872), (32, 12427420), (40, 9941936), (64, 6213710), (80, 4970968), (128, 3106855), (160, 2485484), (320, 1242742), (640, 621371)]