21946730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{401}}^1\times {\mathrm{421}}^1$

素因数の和:842

約数の個数: 32

約数和(自身を含む): 42750288

約数和(自身を除く): 20803558

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 401, 421, 802, 842, 2005, 2105, 4010, 4210, 5213, 5473, 10426, 10946, 26065, 27365, 52130, 54730, 168821, 337642, 844105, 1688210, 2194673, 4389346, 10973365, 21946730]

約数ペア:

[(1, 21946730), (2, 10973365), (5, 4389346), (10, 2194673), (13, 1688210), (26, 844105), (65, 337642), (130, 168821), (401, 54730), (421, 52130), (802, 27365), (842, 26065), (2005, 10946), (2105, 10426), (4010, 5473), (4210, 5213)]