21305080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 54154800

約数和(自身を除く): 32849720

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 97, 136, 152, 170, 190, 194, 289, 323, 340, 380, 388, 485, 578, 646, 680, 760, 776, 970, 1156, 1292, 1445, 1615, 1649, 1843, 1940, 2312, 2584, 2890, 3230, 3298, 3686, 3880, 5491, 5780, 6460, 6596, 7372, 8245, 9215, 10982, 11560, 12920, 13192, 14744, 16490, 18430, 21964, 27455, 28033, 31331, 32980, 36860, 43928, 54910, 56066, 62662, 65960, 73720, 109820, 112132, 125324, 140165, 156655, 219640, 224264, 250648, 280330, 313310, 532627, 560660, 626620, 1065254, 1121320, 1253240, 2130508, 2663135, 4261016, 5326270, 10652540, 21305080]

約数ペア:

[(1, 21305080), (2, 10652540), (4, 5326270), (5, 4261016), (8, 2663135), (10, 2130508), (17, 1253240), (19, 1121320), (20, 1065254), (34, 626620), (38, 560660), (40, 532627), (68, 313310), (76, 280330), (85, 250648), (95, 224264), (97, 219640), (136, 156655), (152, 140165), (170, 125324), (190, 112132), (194, 109820), (289, 73720), (323, 65960), (340, 62662), (380, 56066), (388, 54910), (485, 43928), (578, 36860), (646, 32980), (680, 31331), (760, 28033), (776, 27455), (970, 21964), (1156, 18430), (1292, 16490), (1445, 14744), (1615, 13192), (1649, 12920), (1843, 11560), (1940, 10982), (2312, 9215), (2584, 8245), (2890, 7372), (3230, 6596), (3298, 6460), (3686, 5780), (3880, 5491)]