21512920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{3761}}^1$

素因数の和:3796

約数の個数: 64

約数和(自身を含む): 56881440

約数和(自身を除く): 35368520

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 40, 44, 52, 55, 65, 88, 104, 110, 130, 143, 220, 260, 286, 440, 520, 572, 715, 1144, 1430, 2860, 3761, 5720, 7522, 15044, 18805, 30088, 37610, 41371, 48893, 75220, 82742, 97786, 150440, 165484, 195572, 206855, 244465, 330968, 391144, 413710, 488930, 537823, 827420, 977860, 1075646, 1654840, 1955720, 2151292, 2689115, 4302584, 5378230, 10756460, 21512920]

約数ペア:

[(1, 21512920), (2, 10756460), (4, 5378230), (5, 4302584), (8, 2689115), (10, 2151292), (11, 1955720), (13, 1654840), (20, 1075646), (22, 977860), (26, 827420), (40, 537823), (44, 488930), (52, 413710), (55, 391144), (65, 330968), (88, 244465), (104, 206855), (110, 195572), (130, 165484), (143, 150440), (220, 97786), (260, 82742), (286, 75220), (440, 48893), (520, 41371), (572, 37610), (715, 30088), (1144, 18805), (1430, 15044), (2860, 7522), (3761, 5720)]