28781620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{683}}^1$

素因数の和:749

約数の個数: 72

約数和(自身を含む): 72049824

約数和(自身を除く): 43268204

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 490, 602, 683, 860, 980, 1204, 1366, 1505, 2107, 2732, 3010, 3415, 4214, 4781, 6020, 6830, 8428, 9562, 10535, 13660, 19124, 21070, 23905, 29369, 33467, 42140, 47810, 58738, 66934, 95620, 117476, 133868, 146845, 167335, 205583, 293690, 334670, 411166, 587380, 669340, 822332, 1027915, 1439081, 2055830, 2878162, 4111660, 5756324, 7195405, 14390810, 28781620]

約数ペア:

[(1, 28781620), (2, 14390810), (4, 7195405), (5, 5756324), (7, 4111660), (10, 2878162), (14, 2055830), (20, 1439081), (28, 1027915), (35, 822332), (43, 669340), (49, 587380), (70, 411166), (86, 334670), (98, 293690), (140, 205583), (172, 167335), (196, 146845), (215, 133868), (245, 117476), (301, 95620), (430, 66934), (490, 58738), (602, 47810), (683, 42140), (860, 33467), (980, 29369), (1204, 23905), (1366, 21070), (1505, 19124), (2107, 13660), (2732, 10535), (3010, 9562), (3415, 8428), (4214, 6830), (4781, 6020)]