21400202980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{577}}^1\times {\mathrm{10973}}^1$

素因数の和:11585

約数の個数: 72

約数和(自身を含む): 48752082792

約数和(自身を除く): 27351879812

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 577, 676, 845, 1154, 1690, 2308, 2885, 3380, 5770, 7501, 10973, 11540, 15002, 21946, 30004, 37505, 43892, 54865, 75010, 97513, 109730, 142649, 150020, 195026, 219460, 285298, 390052, 487565, 570596, 713245, 975130, 1426490, 1854437, 1950260, 2852980, 3708874, 6331421, 7417748, 9272185, 12662842, 18544370, 25325684, 31657105, 37088740, 63314210, 82308473, 126628420, 164616946, 329233892, 411542365, 823084730, 1070010149, 1646169460, 2140020298, 4280040596, 5350050745, 10700101490, 21400202980]

約数ペア:

[(1, 21400202980), (2, 10700101490), (4, 5350050745), (5, 4280040596), (10, 2140020298), (13, 1646169460), (20, 1070010149), (26, 823084730), (52, 411542365), (65, 329233892), (130, 164616946), (169, 126628420), (260, 82308473), (338, 63314210), (577, 37088740), (676, 31657105), (845, 25325684), (1154, 18544370), (1690, 12662842), (2308, 9272185), (2885, 7417748), (3380, 6331421), (5770, 3708874), (7501, 2852980), (10973, 1950260), (11540, 1854437), (15002, 1426490), (21946, 975130), (30004, 713245), (37505, 570596), (43892, 487565), (54865, 390052), (75010, 285298), (97513, 219460), (109730, 195026), (142649, 150020)]