20454870

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:309

約数の個数: 64

約数和(自身を含む): 51010560

約数和(自身を除く): 30555690

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 47, 89, 94, 141, 163, 178, 235, 267, 282, 326, 445, 470, 489, 534, 705, 815, 890, 978, 1335, 1410, 1630, 2445, 2670, 4183, 4890, 7661, 8366, 12549, 14507, 15322, 20915, 22983, 25098, 29014, 38305, 41830, 43521, 45966, 62745, 72535, 76610, 87042, 114915, 125490, 145070, 217605, 229830, 435210, 681829, 1363658, 2045487, 3409145, 4090974, 6818290, 10227435, 20454870]

約数ペア:

[(1, 20454870), (2, 10227435), (3, 6818290), (5, 4090974), (6, 3409145), (10, 2045487), (15, 1363658), (30, 681829), (47, 435210), (89, 229830), (94, 217605), (141, 145070), (163, 125490), (178, 114915), (235, 87042), (267, 76610), (282, 72535), (326, 62745), (445, 45966), (470, 43521), (489, 41830), (534, 38305), (705, 29014), (815, 25098), (890, 22983), (978, 20915), (1335, 15322), (1410, 14507), (1630, 12549), (2445, 8366), (2670, 7661), (4183, 4890)]