21272248

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{349}}^1\times {\mathrm{401}}^1$

素因数の和:775

約数の個数: 32

約数和(自身を含む): 42210000

約数和(自身を除く): 20937752

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 349, 401, 698, 802, 1396, 1604, 2792, 3208, 6631, 7619, 13262, 15238, 26524, 30476, 53048, 60952, 139949, 279898, 559796, 1119592, 2659031, 5318062, 10636124, 21272248]

約数ペア:

[(1, 21272248), (2, 10636124), (4, 5318062), (8, 2659031), (19, 1119592), (38, 559796), (76, 279898), (152, 139949), (349, 60952), (401, 53048), (698, 30476), (802, 26524), (1396, 15238), (1604, 13262), (2792, 7619), (3208, 6631)]