21706360

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^4\times {\mathrm{19}}^1$

素因数の和:82

約数の個数: 80

約数和(自身を含む): 55693800

約数和(自身を除く): 33987440

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 169, 190, 247, 260, 338, 380, 494, 520, 676, 760, 845, 988, 1235, 1352, 1690, 1976, 2197, 2470, 3211, 3380, 4394, 4940, 6422, 6760, 8788, 9880, 10985, 12844, 16055, 17576, 21970, 25688, 28561, 32110, 41743, 43940, 57122, 64220, 83486, 87880, 114244, 128440, 142805, 166972, 208715, 228488, 285610, 333944, 417430, 542659, 571220, 834860, 1085318, 1142440, 1669720, 2170636, 2713295, 4341272, 5426590, 10853180, 21706360]

約数ペア:

[(1, 21706360), (2, 10853180), (4, 5426590), (5, 4341272), (8, 2713295), (10, 2170636), (13, 1669720), (19, 1142440), (20, 1085318), (26, 834860), (38, 571220), (40, 542659), (52, 417430), (65, 333944), (76, 285610), (95, 228488), (104, 208715), (130, 166972), (152, 142805), (169, 128440), (190, 114244), (247, 87880), (260, 83486), (338, 64220), (380, 57122), (494, 43940), (520, 41743), (676, 32110), (760, 28561), (845, 25688), (988, 21970), (1235, 17576), (1352, 16055), (1690, 12844), (1976, 10985), (2197, 9880), (2470, 8788), (3211, 6760), (3380, 6422), (4394, 4940)]