20912775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 37810080

約数和(自身を除く): 16897305

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 89, 195, 241, 267, 325, 445, 723, 975, 1157, 1205, 1335, 2225, 3133, 3471, 3615, 5785, 6025, 6675, 9399, 15665, 17355, 18075, 21449, 28925, 46995, 64347, 78325, 86775, 107245, 234975, 278837, 321735, 536225, 836511, 1394185, 1608675, 4182555, 6970925, 20912775]

約数ペア:

[(1, 20912775), (3, 6970925), (5, 4182555), (13, 1608675), (15, 1394185), (25, 836511), (39, 536225), (65, 321735), (75, 278837), (89, 234975), (195, 107245), (241, 86775), (267, 78325), (325, 64347), (445, 46995), (723, 28925), (975, 21449), (1157, 18075), (1205, 17355), (1335, 15665), (2225, 9399), (3133, 6675), (3471, 6025), (3615, 5785)]