21531484

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 45403008

約数和(自身を除く): 23871524

約数列:

[1, 2, 4, 13, 19, 26, 31, 37, 38, 52, 62, 74, 76, 124, 148, 247, 361, 403, 481, 494, 589, 703, 722, 806, 962, 988, 1147, 1178, 1406, 1444, 1612, 1924, 2294, 2356, 2812, 4588, 4693, 7657, 9139, 9386, 11191, 13357, 14911, 15314, 18278, 18772, 21793, 22382, 26714, 29822, 30628, 36556, 43586, 44764, 53428, 59644, 87172, 145483, 173641, 283309, 290966, 347282, 414067, 566618, 581932, 694564, 828134, 1133236, 1656268, 5382871, 10765742, 21531484]

約数ペア:

[(1, 21531484), (2, 10765742), (4, 5382871), (13, 1656268), (19, 1133236), (26, 828134), (31, 694564), (37, 581932), (38, 566618), (52, 414067), (62, 347282), (74, 290966), (76, 283309), (124, 173641), (148, 145483), (247, 87172), (361, 59644), (403, 53428), (481, 44764), (494, 43586), (589, 36556), (703, 30628), (722, 29822), (806, 26714), (962, 22382), (988, 21793), (1147, 18772), (1178, 18278), (1406, 15314), (1444, 14911), (1612, 13357), (1924, 11191), (2294, 9386), (2356, 9139), (2812, 7657), (4588, 4693)]