21631220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{307}}^1$

素因数の和:600

約数の個数: 48

約数和(自身を含む): 49260288

約数和(自身を除く): 27629068

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 271, 307, 542, 614, 1084, 1228, 1355, 1535, 2710, 3070, 3523, 3991, 5420, 6140, 7046, 7982, 14092, 15964, 17615, 19955, 35230, 39910, 70460, 79820, 83197, 166394, 332788, 415985, 831970, 1081561, 1663940, 2163122, 4326244, 5407805, 10815610, 21631220]

約数ペア:

[(1, 21631220), (2, 10815610), (4, 5407805), (5, 4326244), (10, 2163122), (13, 1663940), (20, 1081561), (26, 831970), (52, 415985), (65, 332788), (130, 166394), (260, 83197), (271, 79820), (307, 70460), (542, 39910), (614, 35230), (1084, 19955), (1228, 17615), (1355, 15964), (1535, 14092), (2710, 7982), (3070, 7046), (3523, 6140), (3991, 5420)]