21320040

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1493}}^1$

素因数の和:1531

約数の個数: 128

約数和(自身を含む): 77448960

約数和(自身を除く): 56128920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1428, 1493, 1785, 2040, 2380, 2856, 2986, 3570, 4479, 4760, 5972, 7140, 7465, 8958, 10451, 11944, 14280, 14930, 17916, 20902, 22395, 25381, 29860, 31353, 35832, 41804, 44790, 50762, 52255, 59720, 62706, 76143, 83608, 89580, 101524, 104510, 125412, 126905, 152286, 156765, 177667, 179160, 203048, 209020, 250824, 253810, 304572, 313530, 355334, 380715, 418040, 507620, 533001, 609144, 627060, 710668, 761430, 888335, 1015240, 1066002, 1254120, 1421336, 1522860, 1776670, 2132004, 2665005, 3045720, 3553340, 4264008, 5330010, 7106680, 10660020, 21320040]

約数ペア:

[(1, 21320040), (2, 10660020), (3, 7106680), (4, 5330010), (5, 4264008), (6, 3553340), (7, 3045720), (8, 2665005), (10, 2132004), (12, 1776670), (14, 1522860), (15, 1421336), (17, 1254120), (20, 1066002), (21, 1015240), (24, 888335), (28, 761430), (30, 710668), (34, 627060), (35, 609144), (40, 533001), (42, 507620), (51, 418040), (56, 380715), (60, 355334), (68, 313530), (70, 304572), (84, 253810), (85, 250824), (102, 209020), (105, 203048), (119, 179160), (120, 177667), (136, 156765), (140, 152286), (168, 126905), (170, 125412), (204, 104510), (210, 101524), (238, 89580), (255, 83608), (280, 76143), (340, 62706), (357, 59720), (408, 52255), (420, 50762), (476, 44790), (510, 41804), (595, 35832), (680, 31353), (714, 29860), (840, 25381), (952, 22395), (1020, 20902), (1190, 17916), (1428, 14930), (1493, 14280), (1785, 11944), (2040, 10451), (2380, 8958), (2856, 7465), (2986, 7140), (3570, 5972), (4479, 4760)]