21887240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{929}}^1$

素因数の和:990

約数の個数: 64

約数和(自身を含む): 53568000

約数和(自身を除く): 31680760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 124, 152, 155, 190, 248, 310, 380, 589, 620, 760, 929, 1178, 1240, 1858, 2356, 2945, 3716, 4645, 4712, 5890, 7432, 9290, 11780, 17651, 18580, 23560, 28799, 35302, 37160, 57598, 70604, 88255, 115196, 141208, 143995, 176510, 230392, 287990, 353020, 547181, 575980, 706040, 1094362, 1151960, 2188724, 2735905, 4377448, 5471810, 10943620, 21887240]

約数ペア:

[(1, 21887240), (2, 10943620), (4, 5471810), (5, 4377448), (8, 2735905), (10, 2188724), (19, 1151960), (20, 1094362), (31, 706040), (38, 575980), (40, 547181), (62, 353020), (76, 287990), (95, 230392), (124, 176510), (152, 143995), (155, 141208), (190, 115196), (248, 88255), (310, 70604), (380, 57598), (589, 37160), (620, 35302), (760, 28799), (929, 23560), (1178, 18580), (1240, 17651), (1858, 11780), (2356, 9290), (2945, 7432), (3716, 5890), (4645, 4712)]