21221120

素因数分解:

$2^8\times 5^1\times {\mathrm{59}}^1\times {\mathrm{281}}^1$

素因数の和:361

約数の個数: 72

約数和(自身を含む): 51876720

約数和(自身を除く): 30655600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 128, 160, 236, 256, 281, 295, 320, 472, 562, 590, 640, 944, 1124, 1180, 1280, 1405, 1888, 2248, 2360, 2810, 3776, 4496, 4720, 5620, 7552, 8992, 9440, 11240, 15104, 16579, 17984, 18880, 22480, 33158, 35968, 37760, 44960, 66316, 71936, 75520, 82895, 89920, 132632, 165790, 179840, 265264, 331580, 359680, 530528, 663160, 1061056, 1326320, 2122112, 2652640, 4244224, 5305280, 10610560, 21221120]

約数ペア:

[(1, 21221120), (2, 10610560), (4, 5305280), (5, 4244224), (8, 2652640), (10, 2122112), (16, 1326320), (20, 1061056), (32, 663160), (40, 530528), (59, 359680), (64, 331580), (80, 265264), (118, 179840), (128, 165790), (160, 132632), (236, 89920), (256, 82895), (281, 75520), (295, 71936), (320, 66316), (472, 44960), (562, 37760), (590, 35968), (640, 33158), (944, 22480), (1124, 18880), (1180, 17984), (1280, 16579), (1405, 15104), (1888, 11240), (2248, 9440), (2360, 8992), (2810, 7552), (3776, 5620), (4496, 4720)]