19853960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:175

約数の個数: 128

約数和(自身を含む): 55883520

約数和(自身を除く): 36029560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 43, 56, 68, 70, 85, 86, 97, 119, 136, 140, 170, 172, 194, 215, 238, 280, 301, 340, 344, 388, 430, 476, 485, 595, 602, 679, 680, 731, 776, 860, 952, 970, 1190, 1204, 1358, 1462, 1505, 1649, 1720, 1940, 2380, 2408, 2716, 2924, 3010, 3298, 3395, 3655, 3880, 4171, 4760, 5117, 5432, 5848, 6020, 6596, 6790, 7310, 8245, 8342, 10234, 11543, 12040, 13192, 13580, 14620, 16490, 16684, 20468, 20855, 23086, 25585, 27160, 29197, 29240, 32980, 33368, 40936, 41710, 46172, 51170, 57715, 58394, 65960, 70907, 83420, 92344, 102340, 115430, 116788, 141814, 145985, 166840, 204680, 230860, 233576, 283628, 291970, 354535, 461720, 496349, 567256, 583940, 709070, 992698, 1167880, 1418140, 1985396, 2481745, 2836280, 3970792, 4963490, 9926980, 19853960]

約数ペア:

[(1, 19853960), (2, 9926980), (4, 4963490), (5, 3970792), (7, 2836280), (8, 2481745), (10, 1985396), (14, 1418140), (17, 1167880), (20, 992698), (28, 709070), (34, 583940), (35, 567256), (40, 496349), (43, 461720), (56, 354535), (68, 291970), (70, 283628), (85, 233576), (86, 230860), (97, 204680), (119, 166840), (136, 145985), (140, 141814), (170, 116788), (172, 115430), (194, 102340), (215, 92344), (238, 83420), (280, 70907), (301, 65960), (340, 58394), (344, 57715), (388, 51170), (430, 46172), (476, 41710), (485, 40936), (595, 33368), (602, 32980), (679, 29240), (680, 29197), (731, 27160), (776, 25585), (860, 23086), (952, 20855), (970, 20468), (1190, 16684), (1204, 16490), (1358, 14620), (1462, 13580), (1505, 13192), (1649, 12040), (1720, 11543), (1940, 10234), (2380, 8342), (2408, 8245), (2716, 7310), (2924, 6790), (3010, 6596), (3298, 6020), (3395, 5848), (3655, 5432), (3880, 5117), (4171, 4760)]