20800520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:235

約数の個数: 96

約数和(自身を含む): 53955720

約数和(自身を除く): 33155200

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 169, 170, 181, 221, 260, 338, 340, 362, 442, 520, 676, 680, 724, 845, 884, 905, 1105, 1352, 1448, 1690, 1768, 1810, 2210, 2353, 2873, 3077, 3380, 3620, 4420, 4706, 5746, 6154, 6760, 7240, 8840, 9412, 11492, 11765, 12308, 14365, 15385, 18824, 22984, 23530, 24616, 28730, 30589, 30770, 40001, 47060, 57460, 61178, 61540, 80002, 94120, 114920, 122356, 123080, 152945, 160004, 200005, 244712, 305890, 320008, 400010, 520013, 611780, 800020, 1040026, 1223560, 1600040, 2080052, 2600065, 4160104, 5200130, 10400260, 20800520]

約数ペア:

[(1, 20800520), (2, 10400260), (4, 5200130), (5, 4160104), (8, 2600065), (10, 2080052), (13, 1600040), (17, 1223560), (20, 1040026), (26, 800020), (34, 611780), (40, 520013), (52, 400010), (65, 320008), (68, 305890), (85, 244712), (104, 200005), (130, 160004), (136, 152945), (169, 123080), (170, 122356), (181, 114920), (221, 94120), (260, 80002), (338, 61540), (340, 61178), (362, 57460), (442, 47060), (520, 40001), (676, 30770), (680, 30589), (724, 28730), (845, 24616), (884, 23530), (905, 22984), (1105, 18824), (1352, 15385), (1448, 14365), (1690, 12308), (1768, 11765), (1810, 11492), (2210, 9412), (2353, 8840), (2873, 7240), (3077, 6760), (3380, 6154), (3620, 5746), (4420, 4706)]