21017628

素因数分解:

$2^2\times 3^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{509}}^1$

素因数の和:587

約数の個数: 72

約数和(自身を含む): 56434560

約数和(自身を除く): 35416932

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 31, 36, 37, 62, 74, 93, 111, 124, 148, 186, 222, 279, 333, 372, 444, 509, 558, 666, 1018, 1116, 1147, 1332, 1527, 2036, 2294, 3054, 3441, 4581, 4588, 6108, 6882, 9162, 10323, 13764, 15779, 18324, 18833, 20646, 31558, 37666, 41292, 47337, 56499, 63116, 75332, 94674, 112998, 142011, 169497, 189348, 225996, 284022, 338994, 568044, 583823, 677988, 1167646, 1751469, 2335292, 3502938, 5254407, 7005876, 10508814, 21017628]

約数ペア:

[(1, 21017628), (2, 10508814), (3, 7005876), (4, 5254407), (6, 3502938), (9, 2335292), (12, 1751469), (18, 1167646), (31, 677988), (36, 583823), (37, 568044), (62, 338994), (74, 284022), (93, 225996), (111, 189348), (124, 169497), (148, 142011), (186, 112998), (222, 94674), (279, 75332), (333, 63116), (372, 56499), (444, 47337), (509, 41292), (558, 37666), (666, 31558), (1018, 20646), (1116, 18833), (1147, 18324), (1332, 15779), (1527, 13764), (2036, 10323), (2294, 9162), (3054, 6882), (3441, 6108), (4581, 4588)]