21164925

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{263}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 37319040

約数和(自身を除く): 16154115

約数列:

[1, 3, 5, 15, 25, 29, 37, 75, 87, 111, 145, 185, 263, 435, 555, 725, 789, 925, 1073, 1315, 2175, 2775, 3219, 3945, 5365, 6575, 7627, 9731, 16095, 19725, 22881, 26825, 29193, 38135, 48655, 80475, 114405, 145965, 190675, 243275, 282199, 572025, 729825, 846597, 1410995, 4232985, 7054975, 21164925]

約数ペア:

[(1, 21164925), (3, 7054975), (5, 4232985), (15, 1410995), (25, 846597), (29, 729825), (37, 572025), (75, 282199), (87, 243275), (111, 190675), (145, 145965), (185, 114405), (263, 80475), (435, 48655), (555, 38135), (725, 29193), (789, 26825), (925, 22881), (1073, 19725), (1315, 16095), (2175, 9731), (2775, 7627), (3219, 6575), (3945, 5365)]