21987184

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{457}}^1$

素因数の和:593

約数の個数: 40

約数和(自身を含む): 44524928

約数和(自身を除く): 22537744

約数列:

[1, 2, 4, 8, 16, 31, 62, 97, 124, 194, 248, 388, 457, 496, 776, 914, 1552, 1828, 3007, 3656, 6014, 7312, 12028, 14167, 24056, 28334, 44329, 48112, 56668, 88658, 113336, 177316, 226672, 354632, 709264, 1374199, 2748398, 5496796, 10993592, 21987184]

約数ペア:

[(1, 21987184), (2, 10993592), (4, 5496796), (8, 2748398), (16, 1374199), (31, 709264), (62, 354632), (97, 226672), (124, 177316), (194, 113336), (248, 88658), (388, 56668), (457, 48112), (496, 44329), (776, 28334), (914, 24056), (1552, 14167), (1828, 12028), (3007, 7312), (3656, 6014)]