61980100

素因数分解:

$2^2\times 5^2\times 7^3\times {\mathrm{13}}^1\times {\mathrm{139}}^1$

素因数の和:187

約数の個数: 144

約数和(自身を含む): 170128000

約数和(自身を除く): 108147900

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 25, 26, 28, 35, 49, 50, 52, 65, 70, 91, 98, 100, 130, 139, 140, 175, 182, 196, 245, 260, 278, 325, 343, 350, 364, 455, 490, 556, 637, 650, 686, 695, 700, 910, 973, 980, 1225, 1274, 1300, 1372, 1390, 1715, 1807, 1820, 1946, 2275, 2450, 2548, 2780, 3185, 3430, 3475, 3614, 3892, 4459, 4550, 4865, 4900, 6370, 6811, 6860, 6950, 7228, 8575, 8918, 9035, 9100, 9730, 12649, 12740, 13622, 13900, 15925, 17150, 17836, 18070, 19460, 22295, 24325, 25298, 27244, 31850, 34055, 34300, 36140, 44590, 45175, 47677, 48650, 50596, 63245, 63700, 68110, 88543, 89180, 90350, 95354, 97300, 111475, 126490, 136220, 170275, 177086, 180700, 190708, 222950, 238385, 252980, 316225, 340550, 354172, 442715, 445900, 476770, 619801, 632450, 681100, 885430, 953540, 1191925, 1239602, 1264900, 1770860, 2213575, 2383850, 2479204, 3099005, 4427150, 4767700, 6198010, 8854300, 12396020, 15495025, 30990050, 61980100]

約数ペア:

[(1, 61980100), (2, 30990050), (4, 15495025), (5, 12396020), (7, 8854300), (10, 6198010), (13, 4767700), (14, 4427150), (20, 3099005), (25, 2479204), (26, 2383850), (28, 2213575), (35, 1770860), (49, 1264900), (50, 1239602), (52, 1191925), (65, 953540), (70, 885430), (91, 681100), (98, 632450), (100, 619801), (130, 476770), (139, 445900), (140, 442715), (175, 354172), (182, 340550), (196, 316225), (245, 252980), (260, 238385), (278, 222950), (325, 190708), (343, 180700), (350, 177086), (364, 170275), (455, 136220), (490, 126490), (556, 111475), (637, 97300), (650, 95354), (686, 90350), (695, 89180), (700, 88543), (910, 68110), (973, 63700), (980, 63245), (1225, 50596), (1274, 48650), (1300, 47677), (1372, 45175), (1390, 44590), (1715, 36140), (1807, 34300), (1820, 34055), (1946, 31850), (2275, 27244), (2450, 25298), (2548, 24325), (2780, 22295), (3185, 19460), (3430, 18070), (3475, 17836), (3614, 17150), (3892, 15925), (4459, 13900), (4550, 13622), (4865, 12740), (4900, 12649), (6370, 9730), (6811, 9100), (6860, 9035), (6950, 8918), (7228, 8575)]