21330920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1$

素因数の和:187

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 36729880

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 19, 20, 26, 34, 38, 40, 52, 65, 68, 76, 85, 95, 104, 127, 130, 136, 152, 170, 190, 221, 247, 254, 260, 323, 340, 380, 442, 494, 508, 520, 635, 646, 680, 760, 884, 988, 1016, 1105, 1235, 1270, 1292, 1615, 1651, 1768, 1976, 2159, 2210, 2413, 2470, 2540, 2584, 3230, 3302, 4199, 4318, 4420, 4826, 4940, 5080, 6460, 6604, 8255, 8398, 8636, 8840, 9652, 9880, 10795, 12065, 12920, 13208, 16510, 16796, 17272, 19304, 20995, 21590, 24130, 28067, 31369, 33020, 33592, 41021, 41990, 43180, 48260, 56134, 62738, 66040, 82042, 83980, 86360, 96520, 112268, 125476, 140335, 156845, 164084, 167960, 205105, 224536, 250952, 280670, 313690, 328168, 410210, 533273, 561340, 627380, 820420, 1066546, 1122680, 1254760, 1640840, 2133092, 2666365, 4266184, 5332730, 10665460, 21330920]

約数ペア:

[(1, 21330920), (2, 10665460), (4, 5332730), (5, 4266184), (8, 2666365), (10, 2133092), (13, 1640840), (17, 1254760), (19, 1122680), (20, 1066546), (26, 820420), (34, 627380), (38, 561340), (40, 533273), (52, 410210), (65, 328168), (68, 313690), (76, 280670), (85, 250952), (95, 224536), (104, 205105), (127, 167960), (130, 164084), (136, 156845), (152, 140335), (170, 125476), (190, 112268), (221, 96520), (247, 86360), (254, 83980), (260, 82042), (323, 66040), (340, 62738), (380, 56134), (442, 48260), (494, 43180), (508, 41990), (520, 41021), (635, 33592), (646, 33020), (680, 31369), (760, 28067), (884, 24130), (988, 21590), (1016, 20995), (1105, 19304), (1235, 17272), (1270, 16796), (1292, 16510), (1615, 13208), (1651, 12920), (1768, 12065), (1976, 10795), (2159, 9880), (2210, 9652), (2413, 8840), (2470, 8636), (2540, 8398), (2584, 8255), (3230, 6604), (3302, 6460), (4199, 5080), (4318, 4940), (4420, 4826)]