21150975

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{313}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 37845792

約数和(自身を除く): 16694817

約数列:

[1, 3, 5, 15, 17, 25, 51, 53, 75, 85, 159, 255, 265, 313, 425, 795, 901, 939, 1275, 1325, 1565, 2703, 3975, 4505, 4695, 5321, 7825, 13515, 15963, 16589, 22525, 23475, 26605, 49767, 67575, 79815, 82945, 133025, 248835, 282013, 399075, 414725, 846039, 1244175, 1410065, 4230195, 7050325, 21150975]

約数ペア:

[(1, 21150975), (3, 7050325), (5, 4230195), (15, 1410065), (17, 1244175), (25, 846039), (51, 414725), (53, 399075), (75, 282013), (85, 248835), (159, 133025), (255, 82945), (265, 79815), (313, 67575), (425, 49767), (795, 26605), (901, 23475), (939, 22525), (1275, 16589), (1325, 15963), (1565, 13515), (2703, 7825), (3975, 5321), (4505, 4695)]