21505250

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^2\times {\mathrm{509}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 43678440

約数和(自身を除く): 22173190

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 169, 250, 325, 338, 509, 650, 845, 1018, 1625, 1690, 2545, 3250, 4225, 5090, 6617, 8450, 12725, 13234, 21125, 25450, 33085, 42250, 63625, 66170, 86021, 127250, 165425, 172042, 330850, 430105, 827125, 860210, 1654250, 2150525, 4301050, 10752625, 21505250]

約数ペア:

[(1, 21505250), (2, 10752625), (5, 4301050), (10, 2150525), (13, 1654250), (25, 860210), (26, 827125), (50, 430105), (65, 330850), (125, 172042), (130, 165425), (169, 127250), (250, 86021), (325, 66170), (338, 63625), (509, 42250), (650, 33085), (845, 25450), (1018, 21125), (1625, 13234), (1690, 12725), (2545, 8450), (3250, 6617), (4225, 5090)]