21426250

素因数分解:

$2^1\times 5^4\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:364

約数の個数: 40

約数和(自身を含む): 40965012

約数和(自身を除く): 19538762

約数列:

[1, 2, 5, 10, 25, 50, 61, 122, 125, 250, 281, 305, 562, 610, 625, 1250, 1405, 1525, 2810, 3050, 7025, 7625, 14050, 15250, 17141, 34282, 35125, 38125, 70250, 76250, 85705, 171410, 175625, 351250, 428525, 857050, 2142625, 4285250, 10713125, 21426250]

約数ペア:

[(1, 21426250), (2, 10713125), (5, 4285250), (10, 2142625), (25, 857050), (50, 428525), (61, 351250), (122, 175625), (125, 171410), (250, 85705), (281, 76250), (305, 70250), (562, 38125), (610, 35125), (625, 34282), (1250, 17141), (1405, 15250), (1525, 14050), (2810, 7625), (3050, 7025)]