21143980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7393}}^1$

素因数の和:7426

約数の個数: 48

約数和(自身を含む): 52172064

約数和(自身を除く): 31028084

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7393, 14786, 29572, 36965, 73930, 81323, 96109, 147860, 162646, 192218, 325292, 384436, 406615, 480545, 813230, 961090, 1057199, 1626460, 1922180, 2114398, 4228796, 5285995, 10571990, 21143980]

約数ペア:

[(1, 21143980), (2, 10571990), (4, 5285995), (5, 4228796), (10, 2114398), (11, 1922180), (13, 1626460), (20, 1057199), (22, 961090), (26, 813230), (44, 480545), (52, 406615), (55, 384436), (65, 325292), (110, 192218), (130, 162646), (143, 147860), (220, 96109), (260, 81323), (286, 73930), (572, 36965), (715, 29572), (1430, 14786), (2860, 7393)]