161891720

素因数分解:

$2^3\times 5^1\times {\mathrm{401}}^1\times {\mathrm{10093}}^1$

素因数の和:10505

約数の個数: 32

約数和(自身を含む): 365200920

約数和(自身を除く): 203309200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 401, 802, 1604, 2005, 3208, 4010, 8020, 10093, 16040, 20186, 40372, 50465, 80744, 100930, 201860, 403720, 4047293, 8094586, 16189172, 20236465, 32378344, 40472930, 80945860, 161891720]

約数ペア:

[(1, 161891720), (2, 80945860), (4, 40472930), (5, 32378344), (8, 20236465), (10, 16189172), (20, 8094586), (40, 4047293), (401, 403720), (802, 201860), (1604, 100930), (2005, 80744), (3208, 50465), (4010, 40372), (8020, 20186), (10093, 16040)]