21461990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{499}}^1$

素因数の和:557

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 25194010

約数列:

[1, 2, 5, 10, 11, 17, 22, 23, 34, 46, 55, 85, 110, 115, 170, 187, 230, 253, 374, 391, 499, 506, 782, 935, 998, 1265, 1870, 1955, 2495, 2530, 3910, 4301, 4990, 5489, 8483, 8602, 10978, 11477, 16966, 21505, 22954, 27445, 42415, 43010, 54890, 57385, 84830, 93313, 114770, 126247, 186626, 195109, 252494, 390218, 466565, 631235, 933130, 975545, 1262470, 1951090, 2146199, 4292398, 10730995, 21461990]

約数ペア:

[(1, 21461990), (2, 10730995), (5, 4292398), (10, 2146199), (11, 1951090), (17, 1262470), (22, 975545), (23, 933130), (34, 631235), (46, 466565), (55, 390218), (85, 252494), (110, 195109), (115, 186626), (170, 126247), (187, 114770), (230, 93313), (253, 84830), (374, 57385), (391, 54890), (499, 43010), (506, 42415), (782, 27445), (935, 22954), (998, 21505), (1265, 16966), (1870, 11477), (1955, 10978), (2495, 8602), (2530, 8483), (3910, 5489), (4301, 4990)]