21428772

素因数分解:

$2^2\times 3^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{167}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 54876864

約数和(自身を除く): 33448092

約数列:

[1, 2, 3, 4, 6, 12, 17, 34, 37, 51, 68, 74, 102, 111, 148, 167, 204, 222, 289, 334, 444, 501, 578, 629, 668, 867, 1002, 1156, 1258, 1734, 1887, 2004, 2516, 2839, 3468, 3774, 5678, 6179, 7548, 8517, 10693, 11356, 12358, 17034, 18537, 21386, 24716, 32079, 34068, 37074, 42772, 48263, 64158, 74148, 96526, 105043, 128316, 144789, 193052, 210086, 289578, 315129, 420172, 579156, 630258, 1260516, 1785731, 3571462, 5357193, 7142924, 10714386, 21428772]

約数ペア:

[(1, 21428772), (2, 10714386), (3, 7142924), (4, 5357193), (6, 3571462), (12, 1785731), (17, 1260516), (34, 630258), (37, 579156), (51, 420172), (68, 315129), (74, 289578), (102, 210086), (111, 193052), (148, 144789), (167, 128316), (204, 105043), (222, 96526), (289, 74148), (334, 64158), (444, 48263), (501, 42772), (578, 37074), (629, 34068), (668, 32079), (867, 24716), (1002, 21386), (1156, 18537), (1258, 17034), (1734, 12358), (1887, 11356), (2004, 10693), (2516, 8517), (2839, 7548), (3468, 6179), (3774, 5678)]