21531860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:225

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 34351660

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 83, 85, 109, 119, 140, 166, 170, 218, 238, 332, 340, 415, 436, 476, 545, 581, 595, 763, 830, 1090, 1162, 1190, 1411, 1526, 1660, 1853, 2180, 2324, 2380, 2822, 2905, 3052, 3706, 3815, 5644, 5810, 7055, 7412, 7630, 9047, 9265, 9877, 11620, 12971, 14110, 15260, 18094, 18530, 19754, 25942, 28220, 36188, 37060, 39508, 45235, 49385, 51884, 63329, 64855, 90470, 98770, 126658, 129710, 153799, 180940, 197540, 253316, 259420, 307598, 316645, 615196, 633290, 768995, 1076593, 1266580, 1537990, 2153186, 3075980, 4306372, 5382965, 10765930, 21531860]

約数ペア:

[(1, 21531860), (2, 10765930), (4, 5382965), (5, 4306372), (7, 3075980), (10, 2153186), (14, 1537990), (17, 1266580), (20, 1076593), (28, 768995), (34, 633290), (35, 615196), (68, 316645), (70, 307598), (83, 259420), (85, 253316), (109, 197540), (119, 180940), (140, 153799), (166, 129710), (170, 126658), (218, 98770), (238, 90470), (332, 64855), (340, 63329), (415, 51884), (436, 49385), (476, 45235), (545, 39508), (581, 37060), (595, 36188), (763, 28220), (830, 25942), (1090, 19754), (1162, 18530), (1190, 18094), (1411, 15260), (1526, 14110), (1660, 12971), (1853, 11620), (2180, 9877), (2324, 9265), (2380, 9047), (2822, 7630), (2905, 7412), (3052, 7055), (3706, 5810), (3815, 5644)]