20872150

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{197}}^1$

素因数の和:385

約数の個数: 48

約数和(自身を含む): 42278544

約数和(自身を除く): 21406394

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 163, 197, 325, 326, 394, 650, 815, 985, 1630, 1970, 2119, 2561, 4075, 4238, 4925, 5122, 8150, 9850, 10595, 12805, 21190, 25610, 32111, 52975, 64025, 64222, 105950, 128050, 160555, 321110, 417443, 802775, 834886, 1605550, 2087215, 4174430, 10436075, 20872150]

約数ペア:

[(1, 20872150), (2, 10436075), (5, 4174430), (10, 2087215), (13, 1605550), (25, 834886), (26, 802775), (50, 417443), (65, 321110), (130, 160555), (163, 128050), (197, 105950), (325, 64222), (326, 64025), (394, 52975), (650, 32111), (815, 25610), (985, 21190), (1630, 12805), (1970, 10595), (2119, 9850), (2561, 8150), (4075, 5122), (4238, 4925)]