21983220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{239}}^1$

素因数の和:334

約数の個数: 144

約数和(自身を含む): 77575680

約数和(自身を除く): 55592460

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 73, 84, 90, 105, 126, 140, 146, 180, 210, 219, 239, 252, 292, 315, 365, 420, 438, 478, 511, 630, 657, 717, 730, 876, 956, 1022, 1095, 1195, 1260, 1314, 1434, 1460, 1533, 1673, 2044, 2151, 2190, 2390, 2555, 2628, 2868, 3066, 3285, 3346, 3585, 4302, 4380, 4599, 4780, 5019, 5110, 6132, 6570, 6692, 7170, 7665, 8365, 8604, 9198, 10038, 10220, 10755, 13140, 14340, 15057, 15330, 16730, 17447, 18396, 20076, 21510, 22995, 25095, 30114, 30660, 33460, 34894, 43020, 45990, 50190, 52341, 60228, 69788, 75285, 87235, 91980, 100380, 104682, 122129, 150570, 157023, 174470, 209364, 244258, 261705, 301140, 314046, 348940, 366387, 488516, 523410, 610645, 628092, 732774, 785115, 1046820, 1099161, 1221290, 1465548, 1570230, 1831935, 2198322, 2442580, 3140460, 3663870, 4396644, 5495805, 7327740, 10991610, 21983220]

約数ペア:

[(1, 21983220), (2, 10991610), (3, 7327740), (4, 5495805), (5, 4396644), (6, 3663870), (7, 3140460), (9, 2442580), (10, 2198322), (12, 1831935), (14, 1570230), (15, 1465548), (18, 1221290), (20, 1099161), (21, 1046820), (28, 785115), (30, 732774), (35, 628092), (36, 610645), (42, 523410), (45, 488516), (60, 366387), (63, 348940), (70, 314046), (73, 301140), (84, 261705), (90, 244258), (105, 209364), (126, 174470), (140, 157023), (146, 150570), (180, 122129), (210, 104682), (219, 100380), (239, 91980), (252, 87235), (292, 75285), (315, 69788), (365, 60228), (420, 52341), (438, 50190), (478, 45990), (511, 43020), (630, 34894), (657, 33460), (717, 30660), (730, 30114), (876, 25095), (956, 22995), (1022, 21510), (1095, 20076), (1195, 18396), (1260, 17447), (1314, 16730), (1434, 15330), (1460, 15057), (1533, 14340), (1673, 13140), (2044, 10755), (2151, 10220), (2190, 10038), (2390, 9198), (2555, 8604), (2628, 8365), (2868, 7665), (3066, 7170), (3285, 6692), (3346, 6570), (3585, 6132), (4302, 5110), (4380, 5019), (4599, 4780)]