21889972

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 42969472

約数和(自身を除く): 21079500

約数列:

[1, 2, 4, 13, 26, 52, 61, 67, 103, 122, 134, 206, 244, 268, 412, 793, 871, 1339, 1586, 1742, 2678, 3172, 3484, 4087, 5356, 6283, 6901, 8174, 12566, 13802, 16348, 25132, 27604, 53131, 81679, 89713, 106262, 163358, 179426, 212524, 326716, 358852, 420961, 841922, 1683844, 5472493, 10944986, 21889972]

約数ペア:

[(1, 21889972), (2, 10944986), (4, 5472493), (13, 1683844), (26, 841922), (52, 420961), (61, 358852), (67, 326716), (103, 212524), (122, 179426), (134, 163358), (206, 106262), (244, 89713), (268, 81679), (412, 53131), (793, 27604), (871, 25132), (1339, 16348), (1586, 13802), (1742, 12566), (2678, 8174), (3172, 6901), (3484, 6283), (4087, 5356)]