21478480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{929}}^1$

素因数の和:976

約数の個数: 60

約数和(自身を含む): 53104860

約数和(自身を除く): 31626380

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 289, 340, 578, 680, 929, 1156, 1360, 1445, 1858, 2312, 2890, 3716, 4624, 4645, 5780, 7432, 9290, 11560, 14864, 15793, 18580, 23120, 31586, 37160, 63172, 74320, 78965, 126344, 157930, 252688, 268481, 315860, 536962, 631720, 1073924, 1263440, 1342405, 2147848, 2684810, 4295696, 5369620, 10739240, 21478480]

約数ペア:

[(1, 21478480), (2, 10739240), (4, 5369620), (5, 4295696), (8, 2684810), (10, 2147848), (16, 1342405), (17, 1263440), (20, 1073924), (34, 631720), (40, 536962), (68, 315860), (80, 268481), (85, 252688), (136, 157930), (170, 126344), (272, 78965), (289, 74320), (340, 63172), (578, 37160), (680, 31586), (929, 23120), (1156, 18580), (1360, 15793), (1445, 14864), (1858, 11560), (2312, 9290), (2890, 7432), (3716, 5780), (4624, 4645)]