21409120

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{463}}^1$

素因数の和:512

約数の個数: 72

約数和(自身を含む): 53845344

約数和(自身を除く): 32436224

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 289, 340, 463, 544, 578, 680, 926, 1156, 1360, 1445, 1852, 2312, 2315, 2720, 2890, 3704, 4624, 4630, 5780, 7408, 7871, 9248, 9260, 11560, 14816, 15742, 18520, 23120, 31484, 37040, 39355, 46240, 62968, 74080, 78710, 125936, 133807, 157420, 251872, 267614, 314840, 535228, 629680, 669035, 1070456, 1259360, 1338070, 2140912, 2676140, 4281824, 5352280, 10704560, 21409120]

約数ペア:

[(1, 21409120), (2, 10704560), (4, 5352280), (5, 4281824), (8, 2676140), (10, 2140912), (16, 1338070), (17, 1259360), (20, 1070456), (32, 669035), (34, 629680), (40, 535228), (68, 314840), (80, 267614), (85, 251872), (136, 157420), (160, 133807), (170, 125936), (272, 78710), (289, 74080), (340, 62968), (463, 46240), (544, 39355), (578, 37040), (680, 31484), (926, 23120), (1156, 18520), (1360, 15742), (1445, 14816), (1852, 11560), (2312, 9260), (2315, 9248), (2720, 7871), (2890, 7408), (3704, 5780), (4624, 4630)]