28385240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1$

素因数の和:86

約数の個数: 128

約数和(自身を含む): 77112000

約数和(自身を除く): 48726760

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 19, 20, 26, 34, 38, 40, 52, 65, 68, 76, 85, 95, 104, 130, 136, 152, 169, 170, 190, 221, 247, 260, 323, 338, 340, 380, 442, 494, 520, 646, 676, 680, 760, 845, 884, 988, 1105, 1235, 1292, 1352, 1615, 1690, 1768, 1976, 2197, 2210, 2470, 2584, 2873, 3211, 3230, 3380, 4199, 4394, 4420, 4940, 5746, 6422, 6460, 6760, 8398, 8788, 8840, 9880, 10985, 11492, 12844, 12920, 14365, 16055, 16796, 17576, 20995, 21970, 22984, 25688, 28730, 32110, 33592, 37349, 41743, 41990, 43940, 54587, 57460, 64220, 74698, 83486, 83980, 87880, 109174, 114920, 128440, 149396, 166972, 167960, 186745, 208715, 218348, 272935, 298792, 333944, 373490, 417430, 436696, 545870, 709631, 746980, 834860, 1091740, 1419262, 1493960, 1669720, 2183480, 2838524, 3548155, 5677048, 7096310, 14192620, 28385240]

約数ペア:

[(1, 28385240), (2, 14192620), (4, 7096310), (5, 5677048), (8, 3548155), (10, 2838524), (13, 2183480), (17, 1669720), (19, 1493960), (20, 1419262), (26, 1091740), (34, 834860), (38, 746980), (40, 709631), (52, 545870), (65, 436696), (68, 417430), (76, 373490), (85, 333944), (95, 298792), (104, 272935), (130, 218348), (136, 208715), (152, 186745), (169, 167960), (170, 166972), (190, 149396), (221, 128440), (247, 114920), (260, 109174), (323, 87880), (338, 83980), (340, 83486), (380, 74698), (442, 64220), (494, 57460), (520, 54587), (646, 43940), (676, 41990), (680, 41743), (760, 37349), (845, 33592), (884, 32110), (988, 28730), (1105, 25688), (1235, 22984), (1292, 21970), (1352, 20995), (1615, 17576), (1690, 16796), (1768, 16055), (1976, 14365), (2197, 12920), (2210, 12844), (2470, 11492), (2584, 10985), (2873, 9880), (3211, 8840), (3230, 8788), (3380, 8398), (4199, 6760), (4394, 6460), (4420, 6422), (4940, 5746)]