20951745

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{191}}^1$

素因数の和:373

約数の個数: 32

約数和(自身を含む): 34504704

約数和(自身を除く): 13552959

約数列:

[1, 3, 5, 15, 71, 103, 191, 213, 309, 355, 515, 573, 955, 1065, 1545, 2865, 7313, 13561, 19673, 21939, 36565, 40683, 59019, 67805, 98365, 109695, 203415, 295095, 1396783, 4190349, 6983915, 20951745]

約数ペア:

[(1, 20951745), (3, 6983915), (5, 4190349), (15, 1396783), (71, 295095), (103, 203415), (191, 109695), (213, 98365), (309, 67805), (355, 59019), (515, 40683), (573, 36565), (955, 21939), (1065, 19673), (1545, 13561), (2865, 7313)]