28120300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{223}}^1$

素因数の和:347

約数の個数: 72

約数和(自身を含む): 66690176

約数和(自身を除く): 38569876

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 97, 100, 130, 194, 223, 260, 325, 388, 446, 485, 650, 892, 970, 1115, 1261, 1300, 1940, 2230, 2425, 2522, 2899, 4460, 4850, 5044, 5575, 5798, 6305, 9700, 11150, 11596, 12610, 14495, 21631, 22300, 25220, 28990, 31525, 43262, 57980, 63050, 72475, 86524, 108155, 126100, 144950, 216310, 281203, 289900, 432620, 540775, 562406, 1081550, 1124812, 1406015, 2163100, 2812030, 5624060, 7030075, 14060150, 28120300]

約数ペア:

[(1, 28120300), (2, 14060150), (4, 7030075), (5, 5624060), (10, 2812030), (13, 2163100), (20, 1406015), (25, 1124812), (26, 1081550), (50, 562406), (52, 540775), (65, 432620), (97, 289900), (100, 281203), (130, 216310), (194, 144950), (223, 126100), (260, 108155), (325, 86524), (388, 72475), (446, 63050), (485, 57980), (650, 43262), (892, 31525), (970, 28990), (1115, 25220), (1261, 22300), (1300, 21631), (1940, 14495), (2230, 12610), (2425, 11596), (2522, 11150), (2899, 9700), (4460, 6305), (4850, 5798), (5044, 5575)]