20711740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{619}}^1$

素因数の和:874

約数の個数: 48

約数和(自身を含む): 49996800

約数和(自身を除く): 29285060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 239, 478, 619, 956, 1195, 1238, 1673, 2390, 2476, 3095, 3346, 4333, 4780, 6190, 6692, 8365, 8666, 12380, 16730, 17332, 21665, 33460, 43330, 86660, 147941, 295882, 591764, 739705, 1035587, 1479410, 2071174, 2958820, 4142348, 5177935, 10355870, 20711740]

約数ペア:

[(1, 20711740), (2, 10355870), (4, 5177935), (5, 4142348), (7, 2958820), (10, 2071174), (14, 1479410), (20, 1035587), (28, 739705), (35, 591764), (70, 295882), (140, 147941), (239, 86660), (478, 43330), (619, 33460), (956, 21665), (1195, 17332), (1238, 16730), (1673, 12380), (2390, 8666), (2476, 8365), (3095, 6692), (3346, 6190), (4333, 4780)]