20278620

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^2$

素因数の和:129

約数の個数: 144

約数和(自身を含む): 68251680

約数和(自身を除く): 47973060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 30, 34, 36, 45, 47, 51, 54, 60, 68, 85, 90, 94, 102, 108, 135, 141, 153, 170, 180, 188, 204, 235, 255, 270, 282, 306, 340, 423, 459, 470, 510, 540, 564, 612, 705, 765, 799, 846, 918, 940, 1020, 1269, 1410, 1530, 1598, 1692, 1836, 2115, 2209, 2295, 2397, 2538, 2820, 3060, 3196, 3995, 4230, 4418, 4590, 4794, 5076, 6345, 6627, 7191, 7990, 8460, 8836, 9180, 9588, 11045, 11985, 12690, 13254, 14382, 15980, 19881, 21573, 22090, 23970, 25380, 26508, 28764, 33135, 35955, 37553, 39762, 43146, 44180, 47940, 59643, 66270, 71910, 75106, 79524, 86292, 99405, 107865, 112659, 119286, 132540, 143820, 150212, 187765, 198810, 215730, 225318, 238572, 298215, 337977, 375530, 397620, 431460, 450636, 563295, 596430, 675954, 751060, 1013931, 1126590, 1192860, 1351908, 1689885, 2027862, 2253180, 3379770, 4055724, 5069655, 6759540, 10139310, 20278620]

約数ペア:

[(1, 20278620), (2, 10139310), (3, 6759540), (4, 5069655), (5, 4055724), (6, 3379770), (9, 2253180), (10, 2027862), (12, 1689885), (15, 1351908), (17, 1192860), (18, 1126590), (20, 1013931), (27, 751060), (30, 675954), (34, 596430), (36, 563295), (45, 450636), (47, 431460), (51, 397620), (54, 375530), (60, 337977), (68, 298215), (85, 238572), (90, 225318), (94, 215730), (102, 198810), (108, 187765), (135, 150212), (141, 143820), (153, 132540), (170, 119286), (180, 112659), (188, 107865), (204, 99405), (235, 86292), (255, 79524), (270, 75106), (282, 71910), (306, 66270), (340, 59643), (423, 47940), (459, 44180), (470, 43146), (510, 39762), (540, 37553), (564, 35955), (612, 33135), (705, 28764), (765, 26508), (799, 25380), (846, 23970), (918, 22090), (940, 21573), (1020, 19881), (1269, 15980), (1410, 14382), (1530, 13254), (1598, 12690), (1692, 11985), (1836, 11045), (2115, 9588), (2209, 9180), (2295, 8836), (2397, 8460), (2538, 7990), (2820, 7191), (3060, 6627), (3196, 6345), (3995, 5076), (4230, 4794), (4418, 4590)]