28191440

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1091}}^1$

素因数の和:1140

約数の個数: 80

約数和(自身を含む): 73120320

約数和(自身を除く): 44928880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 760, 1091, 1292, 1360, 1520, 1615, 2182, 2584, 3230, 4364, 5168, 5455, 6460, 8728, 10910, 12920, 17456, 18547, 20729, 21820, 25840, 37094, 41458, 43640, 74188, 82916, 87280, 92735, 103645, 148376, 165832, 185470, 207290, 296752, 331664, 352393, 370940, 414580, 704786, 741880, 829160, 1409572, 1483760, 1658320, 1761965, 2819144, 3523930, 5638288, 7047860, 14095720, 28191440]

約数ペア:

[(1, 28191440), (2, 14095720), (4, 7047860), (5, 5638288), (8, 3523930), (10, 2819144), (16, 1761965), (17, 1658320), (19, 1483760), (20, 1409572), (34, 829160), (38, 741880), (40, 704786), (68, 414580), (76, 370940), (80, 352393), (85, 331664), (95, 296752), (136, 207290), (152, 185470), (170, 165832), (190, 148376), (272, 103645), (304, 92735), (323, 87280), (340, 82916), (380, 74188), (646, 43640), (680, 41458), (760, 37094), (1091, 25840), (1292, 21820), (1360, 20729), (1520, 18547), (1615, 17456), (2182, 12920), (2584, 10910), (3230, 8728), (4364, 6460), (5168, 5455)]