20921475

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 37363680

約数和(自身を除く): 16442205

約数列:

[1, 3, 5, 15, 17, 25, 51, 61, 75, 85, 183, 255, 269, 305, 425, 807, 915, 1037, 1275, 1345, 1525, 3111, 4035, 4573, 4575, 5185, 6725, 13719, 15555, 16409, 20175, 22865, 25925, 49227, 68595, 77775, 82045, 114325, 246135, 278953, 342975, 410225, 836859, 1230675, 1394765, 4184295, 6973825, 20921475]

約数ペア:

[(1, 20921475), (3, 6973825), (5, 4184295), (15, 1394765), (17, 1230675), (25, 836859), (51, 410225), (61, 342975), (75, 278953), (85, 246135), (183, 114325), (255, 82045), (269, 77775), (305, 68595), (425, 49227), (807, 25925), (915, 22865), (1037, 20175), (1275, 16409), (1345, 15555), (1525, 13719), (3111, 6725), (4035, 5185), (4573, 4575)]