21393573890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{390893}}^1$

素因数の和:391334

約数の個数: 32

約数和(自身を含む): 41569231536

約数和(自身を除く): 20175657646

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 421, 842, 2105, 4210, 5473, 10946, 27365, 54730, 390893, 781786, 1954465, 3908930, 5081609, 10163218, 25408045, 50816090, 164565953, 329131906, 822829765, 1645659530, 2139357389, 4278714778, 10696786945, 21393573890]

約数ペア:

[(1, 21393573890), (2, 10696786945), (5, 4278714778), (10, 2139357389), (13, 1645659530), (26, 822829765), (65, 329131906), (130, 164565953), (421, 50816090), (842, 25408045), (2105, 10163218), (4210, 5081609), (5473, 3908930), (10946, 1954465), (27365, 781786), (54730, 390893)]