81961620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:234

約数の個数: 144

約数和(自身を含む): 254560320

約数和(自身を除く): 172598700

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 59, 60, 65, 78, 118, 130, 137, 156, 169, 177, 195, 236, 260, 274, 295, 338, 354, 390, 411, 507, 548, 590, 676, 685, 708, 767, 780, 822, 845, 885, 1014, 1180, 1370, 1534, 1644, 1690, 1770, 1781, 2028, 2055, 2301, 2535, 2740, 3068, 3380, 3540, 3562, 3835, 4110, 4602, 5070, 5343, 7124, 7670, 8083, 8220, 8905, 9204, 9971, 10140, 10686, 11505, 15340, 16166, 17810, 19942, 21372, 23010, 23153, 24249, 26715, 29913, 32332, 35620, 39884, 40415, 46020, 46306, 48498, 49855, 53430, 59826, 69459, 80830, 92612, 96996, 99710, 105079, 106860, 115765, 119652, 121245, 138918, 149565, 161660, 199420, 210158, 231530, 242490, 277836, 299130, 315237, 347295, 420316, 463060, 484980, 525395, 598260, 630474, 694590, 1050790, 1260948, 1366027, 1389180, 1576185, 2101580, 2732054, 3152370, 4098081, 5464108, 6304740, 6830135, 8196162, 13660270, 16392324, 20490405, 27320540, 40980810, 81961620]

約数ペア:

[(1, 81961620), (2, 40980810), (3, 27320540), (4, 20490405), (5, 16392324), (6, 13660270), (10, 8196162), (12, 6830135), (13, 6304740), (15, 5464108), (20, 4098081), (26, 3152370), (30, 2732054), (39, 2101580), (52, 1576185), (59, 1389180), (60, 1366027), (65, 1260948), (78, 1050790), (118, 694590), (130, 630474), (137, 598260), (156, 525395), (169, 484980), (177, 463060), (195, 420316), (236, 347295), (260, 315237), (274, 299130), (295, 277836), (338, 242490), (354, 231530), (390, 210158), (411, 199420), (507, 161660), (548, 149565), (590, 138918), (676, 121245), (685, 119652), (708, 115765), (767, 106860), (780, 105079), (822, 99710), (845, 96996), (885, 92612), (1014, 80830), (1180, 69459), (1370, 59826), (1534, 53430), (1644, 49855), (1690, 48498), (1770, 46306), (1781, 46020), (2028, 40415), (2055, 39884), (2301, 35620), (2535, 32332), (2740, 29913), (3068, 26715), (3380, 24249), (3540, 23153), (3562, 23010), (3835, 21372), (4110, 19942), (4602, 17810), (5070, 16166), (5343, 15340), (7124, 11505), (7670, 10686), (8083, 10140), (8220, 9971), (8905, 9204)]