21460972

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{599}}^1$

素因数の和:682

約数の個数: 36

約数和(自身を含む): 41504400

約数和(自身を除く): 20043428

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 169, 212, 338, 599, 676, 689, 1198, 1378, 2396, 2756, 7787, 8957, 15574, 17914, 31148, 31747, 35828, 63494, 101231, 126988, 202462, 404924, 412711, 825422, 1650844, 5365243, 10730486, 21460972]

約数ペア:

[(1, 21460972), (2, 10730486), (4, 5365243), (13, 1650844), (26, 825422), (52, 412711), (53, 404924), (106, 202462), (169, 126988), (212, 101231), (338, 63494), (599, 35828), (676, 31747), (689, 31148), (1198, 17914), (1378, 15574), (2396, 8957), (2756, 7787)]