20513940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{269}}^1$

素因数の和:353

約数の個数: 96

約数和(自身を含む): 60963840

約数和(自身を除く): 40449900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 31, 41, 60, 62, 82, 93, 123, 124, 155, 164, 186, 205, 246, 269, 310, 372, 410, 465, 492, 538, 615, 620, 807, 820, 930, 1076, 1230, 1271, 1345, 1614, 1860, 2460, 2542, 2690, 3228, 3813, 4035, 5084, 5380, 6355, 7626, 8070, 8339, 11029, 12710, 15252, 16140, 16678, 19065, 22058, 25017, 25420, 33087, 33356, 38130, 41695, 44116, 50034, 55145, 66174, 76260, 83390, 100068, 110290, 125085, 132348, 165435, 166780, 220580, 250170, 330870, 341899, 500340, 661740, 683798, 1025697, 1367596, 1709495, 2051394, 3418990, 4102788, 5128485, 6837980, 10256970, 20513940]

約数ペア:

[(1, 20513940), (2, 10256970), (3, 6837980), (4, 5128485), (5, 4102788), (6, 3418990), (10, 2051394), (12, 1709495), (15, 1367596), (20, 1025697), (30, 683798), (31, 661740), (41, 500340), (60, 341899), (62, 330870), (82, 250170), (93, 220580), (123, 166780), (124, 165435), (155, 132348), (164, 125085), (186, 110290), (205, 100068), (246, 83390), (269, 76260), (310, 66174), (372, 55145), (410, 50034), (465, 44116), (492, 41695), (538, 38130), (615, 33356), (620, 33087), (807, 25420), (820, 25017), (930, 22058), (1076, 19065), (1230, 16678), (1271, 16140), (1345, 15252), (1614, 12710), (1860, 11029), (2460, 8339), (2542, 8070), (2690, 7626), (3228, 6355), (3813, 5380), (4035, 5084)]