20421700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{683}}^1$

素因数の和:733

約数の個数: 72

約数和(自身を含む): 49871808

約数和(自身を除く): 29450108

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 25, 26, 46, 50, 52, 65, 92, 100, 115, 130, 230, 260, 299, 325, 460, 575, 598, 650, 683, 1150, 1196, 1300, 1366, 1495, 2300, 2732, 2990, 3415, 5980, 6830, 7475, 8879, 13660, 14950, 15709, 17075, 17758, 29900, 31418, 34150, 35516, 44395, 62836, 68300, 78545, 88790, 157090, 177580, 204217, 221975, 314180, 392725, 408434, 443950, 785450, 816868, 887900, 1021085, 1570900, 2042170, 4084340, 5105425, 10210850, 20421700]

約数ペア:

[(1, 20421700), (2, 10210850), (4, 5105425), (5, 4084340), (10, 2042170), (13, 1570900), (20, 1021085), (23, 887900), (25, 816868), (26, 785450), (46, 443950), (50, 408434), (52, 392725), (65, 314180), (92, 221975), (100, 204217), (115, 177580), (130, 157090), (230, 88790), (260, 78545), (299, 68300), (325, 62836), (460, 44395), (575, 35516), (598, 34150), (650, 31418), (683, 29900), (1150, 17758), (1196, 17075), (1300, 15709), (1366, 14950), (1495, 13660), (2300, 8879), (2732, 7475), (2990, 6830), (3415, 5980)]