21866445

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{571}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 40689792

約数和(自身を除く): 18823347

約数列:

[1, 3, 5, 9, 15, 23, 37, 45, 69, 111, 115, 185, 207, 333, 345, 555, 571, 851, 1035, 1665, 1713, 2553, 2855, 4255, 5139, 7659, 8565, 12765, 13133, 21127, 25695, 38295, 39399, 63381, 65665, 105635, 118197, 190143, 196995, 316905, 485921, 590985, 950715, 1457763, 2429605, 4373289, 7288815, 21866445]

約数ペア:

[(1, 21866445), (3, 7288815), (5, 4373289), (9, 2429605), (15, 1457763), (23, 950715), (37, 590985), (45, 485921), (69, 316905), (111, 196995), (115, 190143), (185, 118197), (207, 105635), (333, 65665), (345, 63381), (555, 39399), (571, 38295), (851, 25695), (1035, 21127), (1665, 13133), (1713, 12765), (2553, 8565), (2855, 7659), (4255, 5139)]