21718520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^2$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 55825200

約数和(自身を除く): 34106680

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 41, 68, 76, 82, 85, 95, 136, 152, 164, 170, 190, 205, 323, 328, 340, 380, 410, 646, 680, 697, 760, 779, 820, 1292, 1394, 1558, 1615, 1640, 1681, 2584, 2788, 3116, 3230, 3362, 3485, 3895, 5576, 6232, 6460, 6724, 6970, 7790, 8405, 12920, 13243, 13448, 13940, 15580, 16810, 26486, 27880, 28577, 31160, 31939, 33620, 52972, 57154, 63878, 66215, 67240, 105944, 114308, 127756, 132430, 142885, 159695, 228616, 255512, 264860, 285770, 319390, 529720, 542963, 571540, 638780, 1085926, 1143080, 1277560, 2171852, 2714815, 4343704, 5429630, 10859260, 21718520]

約数ペア:

[(1, 21718520), (2, 10859260), (4, 5429630), (5, 4343704), (8, 2714815), (10, 2171852), (17, 1277560), (19, 1143080), (20, 1085926), (34, 638780), (38, 571540), (40, 542963), (41, 529720), (68, 319390), (76, 285770), (82, 264860), (85, 255512), (95, 228616), (136, 159695), (152, 142885), (164, 132430), (170, 127756), (190, 114308), (205, 105944), (323, 67240), (328, 66215), (340, 63878), (380, 57154), (410, 52972), (646, 33620), (680, 31939), (697, 31160), (760, 28577), (779, 27880), (820, 26486), (1292, 16810), (1394, 15580), (1558, 13940), (1615, 13448), (1640, 13243), (1681, 12920), (2584, 8405), (2788, 7790), (3116, 6970), (3230, 6724), (3362, 6460), (3485, 6232), (3895, 5576)]