21245420

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{163}}^1$

素因数の和:212

約数の個数: 96

約数和(自身を含む): 55104000

約数和(自身を除く): 33858580

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 163, 190, 196, 245, 266, 326, 343, 380, 490, 532, 652, 665, 686, 815, 931, 980, 1141, 1330, 1372, 1630, 1715, 1862, 2282, 2660, 3097, 3260, 3430, 3724, 4564, 4655, 5705, 6194, 6517, 6860, 7987, 9310, 11410, 12388, 13034, 15485, 15974, 18620, 21679, 22820, 26068, 30970, 31948, 32585, 39935, 43358, 55909, 61940, 65170, 79870, 86716, 108395, 111818, 130340, 151753, 159740, 216790, 223636, 279545, 303506, 433580, 559090, 607012, 758765, 1062271, 1118180, 1517530, 2124542, 3035060, 4249084, 5311355, 10622710, 21245420]

約数ペア:

[(1, 21245420), (2, 10622710), (4, 5311355), (5, 4249084), (7, 3035060), (10, 2124542), (14, 1517530), (19, 1118180), (20, 1062271), (28, 758765), (35, 607012), (38, 559090), (49, 433580), (70, 303506), (76, 279545), (95, 223636), (98, 216790), (133, 159740), (140, 151753), (163, 130340), (190, 111818), (196, 108395), (245, 86716), (266, 79870), (326, 65170), (343, 61940), (380, 55909), (490, 43358), (532, 39935), (652, 32585), (665, 31948), (686, 30970), (815, 26068), (931, 22820), (980, 21679), (1141, 18620), (1330, 15974), (1372, 15485), (1630, 13034), (1715, 12388), (1862, 11410), (2282, 9310), (2660, 7987), (3097, 6860), (3260, 6517), (3430, 6194), (3724, 5705), (4564, 4655)]