21415240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{409}}^1$

素因数の和:455

約数の個数: 128

約数和(自身を含む): 63763200

約数和(自身を除く): 42347960

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 17, 20, 22, 28, 34, 35, 40, 44, 55, 56, 68, 70, 77, 85, 88, 110, 119, 136, 140, 154, 170, 187, 220, 238, 280, 308, 340, 374, 385, 409, 440, 476, 595, 616, 680, 748, 770, 818, 935, 952, 1190, 1309, 1496, 1540, 1636, 1870, 2045, 2380, 2618, 2863, 3080, 3272, 3740, 4090, 4499, 4760, 5236, 5726, 6545, 6953, 7480, 8180, 8998, 10472, 11452, 13090, 13906, 14315, 16360, 17996, 22495, 22904, 26180, 27812, 28630, 31493, 34765, 35992, 44990, 48671, 52360, 55624, 57260, 62986, 69530, 76483, 89980, 97342, 114520, 125972, 139060, 152966, 157465, 179960, 194684, 243355, 251944, 278120, 305932, 314930, 382415, 389368, 486710, 535381, 611864, 629860, 764830, 973420, 1070762, 1259720, 1529660, 1946840, 2141524, 2676905, 3059320, 4283048, 5353810, 10707620, 21415240]

約数ペア:

[(1, 21415240), (2, 10707620), (4, 5353810), (5, 4283048), (7, 3059320), (8, 2676905), (10, 2141524), (11, 1946840), (14, 1529660), (17, 1259720), (20, 1070762), (22, 973420), (28, 764830), (34, 629860), (35, 611864), (40, 535381), (44, 486710), (55, 389368), (56, 382415), (68, 314930), (70, 305932), (77, 278120), (85, 251944), (88, 243355), (110, 194684), (119, 179960), (136, 157465), (140, 152966), (154, 139060), (170, 125972), (187, 114520), (220, 97342), (238, 89980), (280, 76483), (308, 69530), (340, 62986), (374, 57260), (385, 55624), (409, 52360), (440, 48671), (476, 44990), (595, 35992), (616, 34765), (680, 31493), (748, 28630), (770, 27812), (818, 26180), (935, 22904), (952, 22495), (1190, 17996), (1309, 16360), (1496, 14315), (1540, 13906), (1636, 13090), (1870, 11452), (2045, 10472), (2380, 8998), (2618, 8180), (2863, 7480), (3080, 6953), (3272, 6545), (3740, 5726), (4090, 5236), (4499, 4760)]