21213140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{983}}^1$

素因数の和:1088

約数の個数: 48

約数和(自身を含む): 48601728

約数和(自身を除く): 27388588

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 83, 130, 166, 260, 332, 415, 830, 983, 1079, 1660, 1966, 2158, 3932, 4316, 4915, 5395, 9830, 10790, 12779, 19660, 21580, 25558, 51116, 63895, 81589, 127790, 163178, 255580, 326356, 407945, 815890, 1060657, 1631780, 2121314, 4242628, 5303285, 10606570, 21213140]

約数ペア:

[(1, 21213140), (2, 10606570), (4, 5303285), (5, 4242628), (10, 2121314), (13, 1631780), (20, 1060657), (26, 815890), (52, 407945), (65, 326356), (83, 255580), (130, 163178), (166, 127790), (260, 81589), (332, 63895), (415, 51116), (830, 25558), (983, 21580), (1079, 19660), (1660, 12779), (1966, 10790), (2158, 9830), (3932, 5395), (4316, 4915)]