64397440

素因数分解:

$2^7\times 5^1\times {\mathrm{100621}}^1$

素因数の和:100640

約数の個数: 32

約数和(自身を含む): 153951660

約数和(自身を除く): 89554220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 100621, 201242, 402484, 503105, 804968, 1006210, 1609936, 2012420, 3219872, 4024840, 6439744, 8049680, 12879488, 16099360, 32198720, 64397440]

約数ペア:

[(1, 64397440), (2, 32198720), (4, 16099360), (5, 12879488), (8, 8049680), (10, 6439744), (16, 4024840), (20, 3219872), (32, 2012420), (40, 1609936), (64, 1006210), (80, 804968), (128, 503105), (160, 402484), (320, 201242), (640, 100621)]