21290450

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:411

約数の個数: 48

約数和(自身を含む): 42393120

約数和(自身を除く): 21102670

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 73, 95, 146, 190, 307, 365, 475, 614, 730, 950, 1387, 1535, 1825, 2774, 3070, 3650, 5833, 6935, 7675, 11666, 13870, 15350, 22411, 29165, 34675, 44822, 58330, 69350, 112055, 145825, 224110, 291650, 425809, 560275, 851618, 1120550, 2129045, 4258090, 10645225, 21290450]

約数ペア:

[(1, 21290450), (2, 10645225), (5, 4258090), (10, 2129045), (19, 1120550), (25, 851618), (38, 560275), (50, 425809), (73, 291650), (95, 224110), (146, 145825), (190, 112055), (307, 69350), (365, 58330), (475, 44822), (614, 34675), (730, 29165), (950, 22411), (1387, 15350), (1535, 13870), (1825, 11666), (2774, 7675), (3070, 6935), (3650, 5833)]