21000525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:231

約数の個数: 96

約数和(自身を含む): 45497088

約数和(自身を除く): 24496563

約数列:

[1, 3, 5, 7, 13, 15, 17, 21, 25, 35, 39, 51, 65, 75, 85, 91, 105, 119, 175, 181, 195, 221, 255, 273, 325, 357, 425, 455, 525, 543, 595, 663, 905, 975, 1105, 1267, 1275, 1365, 1547, 1785, 2275, 2353, 2715, 2975, 3077, 3315, 3801, 4525, 4641, 5525, 6335, 6825, 7059, 7735, 8925, 9231, 11765, 13575, 15385, 16471, 16575, 19005, 21539, 23205, 31675, 35295, 38675, 40001, 46155, 49413, 58825, 64617, 76925, 82355, 95025, 107695, 116025, 120003, 176475, 200005, 230775, 247065, 280007, 323085, 411775, 538475, 600015, 840021, 1000025, 1235325, 1400035, 1615425, 3000075, 4200105, 7000175, 21000525]

約数ペア:

[(1, 21000525), (3, 7000175), (5, 4200105), (7, 3000075), (13, 1615425), (15, 1400035), (17, 1235325), (21, 1000025), (25, 840021), (35, 600015), (39, 538475), (51, 411775), (65, 323085), (75, 280007), (85, 247065), (91, 230775), (105, 200005), (119, 176475), (175, 120003), (181, 116025), (195, 107695), (221, 95025), (255, 82355), (273, 76925), (325, 64617), (357, 58825), (425, 49413), (455, 46155), (525, 40001), (543, 38675), (595, 35295), (663, 31675), (905, 23205), (975, 21539), (1105, 19005), (1267, 16575), (1275, 16471), (1365, 15385), (1547, 13575), (1785, 11765), (2275, 9231), (2353, 8925), (2715, 7735), (2975, 7059), (3077, 6825), (3315, 6335), (3801, 5525), (4525, 4641)]