21278040

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:441

約数の個数: 128

約数和(自身を含む): 74165760

約数和(自身を除く): 52887720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 73, 84, 105, 120, 140, 146, 168, 210, 219, 280, 292, 347, 365, 420, 438, 511, 584, 694, 730, 840, 876, 1022, 1041, 1095, 1388, 1460, 1533, 1735, 1752, 2044, 2082, 2190, 2429, 2555, 2776, 2920, 3066, 3470, 4088, 4164, 4380, 4858, 5110, 5205, 6132, 6940, 7287, 7665, 8328, 8760, 9716, 10220, 10410, 12145, 12264, 13880, 14574, 15330, 19432, 20440, 20820, 24290, 25331, 29148, 30660, 36435, 41640, 48580, 50662, 58296, 61320, 72870, 75993, 97160, 101324, 126655, 145740, 151986, 177317, 202648, 253310, 291480, 303972, 354634, 379965, 506620, 531951, 607944, 709268, 759930, 886585, 1013240, 1063902, 1418536, 1519860, 1773170, 2127804, 2659755, 3039720, 3546340, 4255608, 5319510, 7092680, 10639020, 21278040]

約数ペア:

[(1, 21278040), (2, 10639020), (3, 7092680), (4, 5319510), (5, 4255608), (6, 3546340), (7, 3039720), (8, 2659755), (10, 2127804), (12, 1773170), (14, 1519860), (15, 1418536), (20, 1063902), (21, 1013240), (24, 886585), (28, 759930), (30, 709268), (35, 607944), (40, 531951), (42, 506620), (56, 379965), (60, 354634), (70, 303972), (73, 291480), (84, 253310), (105, 202648), (120, 177317), (140, 151986), (146, 145740), (168, 126655), (210, 101324), (219, 97160), (280, 75993), (292, 72870), (347, 61320), (365, 58296), (420, 50662), (438, 48580), (511, 41640), (584, 36435), (694, 30660), (730, 29148), (840, 25331), (876, 24290), (1022, 20820), (1041, 20440), (1095, 19432), (1388, 15330), (1460, 14574), (1533, 13880), (1735, 12264), (1752, 12145), (2044, 10410), (2082, 10220), (2190, 9716), (2429, 8760), (2555, 8328), (2776, 7665), (2920, 7287), (3066, 6940), (3470, 6132), (4088, 5205), (4164, 5110), (4380, 4858)]