21421680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:375

約数の個数: 160

約数和(自身を含む): 77995008

約数和(自身を除く): 56573328

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 41, 42, 48, 56, 60, 70, 80, 82, 84, 105, 112, 120, 123, 140, 164, 168, 205, 210, 240, 246, 280, 287, 311, 328, 336, 410, 420, 492, 560, 574, 615, 622, 656, 820, 840, 861, 933, 984, 1148, 1230, 1244, 1435, 1555, 1640, 1680, 1722, 1866, 1968, 2177, 2296, 2460, 2488, 2870, 3110, 3280, 3444, 3732, 4305, 4354, 4592, 4665, 4920, 4976, 5740, 6220, 6531, 6888, 7464, 8610, 8708, 9330, 9840, 10885, 11480, 12440, 12751, 13062, 13776, 14928, 17220, 17416, 18660, 21770, 22960, 24880, 25502, 26124, 32655, 34440, 34832, 37320, 38253, 43540, 51004, 52248, 63755, 65310, 68880, 74640, 76506, 87080, 89257, 102008, 104496, 127510, 130620, 153012, 174160, 178514, 191265, 204016, 255020, 261240, 267771, 306024, 357028, 382530, 446285, 510040, 522480, 535542, 612048, 714056, 765060, 892570, 1020080, 1071084, 1338855, 1428112, 1530120, 1785140, 2142168, 2677710, 3060240, 3570280, 4284336, 5355420, 7140560, 10710840, 21421680]

約数ペア:

[(1, 21421680), (2, 10710840), (3, 7140560), (4, 5355420), (5, 4284336), (6, 3570280), (7, 3060240), (8, 2677710), (10, 2142168), (12, 1785140), (14, 1530120), (15, 1428112), (16, 1338855), (20, 1071084), (21, 1020080), (24, 892570), (28, 765060), (30, 714056), (35, 612048), (40, 535542), (41, 522480), (42, 510040), (48, 446285), (56, 382530), (60, 357028), (70, 306024), (80, 267771), (82, 261240), (84, 255020), (105, 204016), (112, 191265), (120, 178514), (123, 174160), (140, 153012), (164, 130620), (168, 127510), (205, 104496), (210, 102008), (240, 89257), (246, 87080), (280, 76506), (287, 74640), (311, 68880), (328, 65310), (336, 63755), (410, 52248), (420, 51004), (492, 43540), (560, 38253), (574, 37320), (615, 34832), (622, 34440), (656, 32655), (820, 26124), (840, 25502), (861, 24880), (933, 22960), (984, 21770), (1148, 18660), (1230, 17416), (1244, 17220), (1435, 14928), (1555, 13776), (1640, 13062), (1680, 12751), (1722, 12440), (1866, 11480), (1968, 10885), (2177, 9840), (2296, 9330), (2460, 8708), (2488, 8610), (2870, 7464), (3110, 6888), (3280, 6531), (3444, 6220), (3732, 5740), (4305, 4976), (4354, 4920), (4592, 4665)]