28605720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1667}}^1$

素因数の和:1705

約数の個数: 128

約数和(自身を含む): 100880640

約数和(自身を除く): 72274920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 20, 22, 24, 26, 30, 33, 39, 40, 44, 52, 55, 60, 65, 66, 78, 88, 104, 110, 120, 130, 132, 143, 156, 165, 195, 220, 260, 264, 286, 312, 330, 390, 429, 440, 520, 572, 660, 715, 780, 858, 1144, 1320, 1430, 1560, 1667, 1716, 2145, 2860, 3334, 3432, 4290, 5001, 5720, 6668, 8335, 8580, 10002, 13336, 16670, 17160, 18337, 20004, 21671, 25005, 33340, 36674, 40008, 43342, 50010, 55011, 65013, 66680, 73348, 86684, 91685, 100020, 108355, 110022, 130026, 146696, 173368, 183370, 200040, 216710, 220044, 238381, 260052, 275055, 325065, 366740, 433420, 440088, 476762, 520104, 550110, 650130, 715143, 733480, 866840, 953524, 1100220, 1191905, 1300260, 1430286, 1907048, 2200440, 2383810, 2600520, 2860572, 3575715, 4767620, 5721144, 7151430, 9535240, 14302860, 28605720]

約数ペア:

[(1, 28605720), (2, 14302860), (3, 9535240), (4, 7151430), (5, 5721144), (6, 4767620), (8, 3575715), (10, 2860572), (11, 2600520), (12, 2383810), (13, 2200440), (15, 1907048), (20, 1430286), (22, 1300260), (24, 1191905), (26, 1100220), (30, 953524), (33, 866840), (39, 733480), (40, 715143), (44, 650130), (52, 550110), (55, 520104), (60, 476762), (65, 440088), (66, 433420), (78, 366740), (88, 325065), (104, 275055), (110, 260052), (120, 238381), (130, 220044), (132, 216710), (143, 200040), (156, 183370), (165, 173368), (195, 146696), (220, 130026), (260, 110022), (264, 108355), (286, 100020), (312, 91685), (330, 86684), (390, 73348), (429, 66680), (440, 65013), (520, 55011), (572, 50010), (660, 43342), (715, 40008), (780, 36674), (858, 33340), (1144, 25005), (1320, 21671), (1430, 20004), (1560, 18337), (1667, 17160), (1716, 16670), (2145, 13336), (2860, 10002), (3334, 8580), (3432, 8335), (4290, 6668), (5001, 5720)]