21911890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1$

素因数の和:248

約数の個数: 96

約数和(自身を含む): 53625600

約数和(自身を除く): 31713710

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 55, 65, 70, 77, 91, 110, 121, 130, 143, 154, 182, 199, 242, 286, 385, 398, 455, 605, 715, 770, 847, 910, 995, 1001, 1210, 1393, 1430, 1573, 1694, 1990, 2002, 2189, 2587, 2786, 3146, 4235, 4378, 5005, 5174, 6965, 7865, 8470, 10010, 10945, 11011, 12935, 13930, 15323, 15730, 18109, 21890, 22022, 24079, 25870, 28457, 30646, 36218, 48158, 55055, 56914, 76615, 90545, 110110, 120395, 142285, 153230, 168553, 181090, 199199, 240790, 284570, 313027, 337106, 398398, 626054, 842765, 995995, 1565135, 1685530, 1991990, 2191189, 3130270, 4382378, 10955945, 21911890]

約数ペア:

[(1, 21911890), (2, 10955945), (5, 4382378), (7, 3130270), (10, 2191189), (11, 1991990), (13, 1685530), (14, 1565135), (22, 995995), (26, 842765), (35, 626054), (55, 398398), (65, 337106), (70, 313027), (77, 284570), (91, 240790), (110, 199199), (121, 181090), (130, 168553), (143, 153230), (154, 142285), (182, 120395), (199, 110110), (242, 90545), (286, 76615), (385, 56914), (398, 55055), (455, 48158), (605, 36218), (715, 30646), (770, 28457), (847, 25870), (910, 24079), (995, 22022), (1001, 21890), (1210, 18109), (1393, 15730), (1430, 15323), (1573, 13930), (1694, 12935), (1990, 11011), (2002, 10945), (2189, 10010), (2587, 8470), (2786, 7865), (3146, 6965), (4235, 5174), (4378, 5005)]