21540376

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{991}}^1$

素因数の和:1040

約数の個数: 64

約数和(自身を含む): 49996800

約数和(自身を除く): 28456424

約数列:

[1, 2, 4, 8, 11, 13, 19, 22, 26, 38, 44, 52, 76, 88, 104, 143, 152, 209, 247, 286, 418, 494, 572, 836, 988, 991, 1144, 1672, 1976, 1982, 2717, 3964, 5434, 7928, 10868, 10901, 12883, 18829, 21736, 21802, 25766, 37658, 43604, 51532, 75316, 87208, 103064, 141713, 150632, 207119, 244777, 283426, 414238, 489554, 566852, 828476, 979108, 1133704, 1656952, 1958216, 2692547, 5385094, 10770188, 21540376]

約数ペア:

[(1, 21540376), (2, 10770188), (4, 5385094), (8, 2692547), (11, 1958216), (13, 1656952), (19, 1133704), (22, 979108), (26, 828476), (38, 566852), (44, 489554), (52, 414238), (76, 283426), (88, 244777), (104, 207119), (143, 150632), (152, 141713), (209, 103064), (247, 87208), (286, 75316), (418, 51532), (494, 43604), (572, 37658), (836, 25766), (988, 21802), (991, 21736), (1144, 18829), (1672, 12883), (1976, 10901), (1982, 10868), (2717, 7928), (3964, 5434)]