81445875

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:138

約数の個数: 128

約数和(自身を含む): 172523520

約数和(自身を除く): 91077645

約数列:

[1, 3, 5, 7, 15, 19, 21, 23, 25, 35, 57, 69, 71, 75, 95, 105, 115, 125, 133, 161, 175, 213, 285, 345, 355, 375, 399, 437, 475, 483, 497, 525, 575, 665, 805, 875, 1065, 1311, 1349, 1425, 1491, 1633, 1725, 1775, 1995, 2185, 2375, 2415, 2485, 2625, 2875, 3059, 3325, 4025, 4047, 4899, 5325, 6555, 6745, 7125, 7455, 8165, 8625, 8875, 9177, 9443, 9975, 10925, 11431, 12075, 12425, 15295, 16625, 20125, 20235, 24495, 26625, 28329, 31027, 32775, 33725, 34293, 37275, 40825, 45885, 47215, 49875, 54625, 57155, 60375, 62125, 76475, 93081, 101175, 122475, 141645, 155135, 163875, 168625, 171465, 186375, 204125, 217189, 229425, 236075, 285775, 382375, 465405, 505875, 612375, 651567, 708225, 775675, 857325, 1085945, 1147125, 1180375, 1428875, 2327025, 3257835, 3541125, 3878375, 4286625, 5429725, 11635125, 16289175, 27148625, 81445875]

約数ペア:

[(1, 81445875), (3, 27148625), (5, 16289175), (7, 11635125), (15, 5429725), (19, 4286625), (21, 3878375), (23, 3541125), (25, 3257835), (35, 2327025), (57, 1428875), (69, 1180375), (71, 1147125), (75, 1085945), (95, 857325), (105, 775675), (115, 708225), (125, 651567), (133, 612375), (161, 505875), (175, 465405), (213, 382375), (285, 285775), (345, 236075), (355, 229425), (375, 217189), (399, 204125), (437, 186375), (475, 171465), (483, 168625), (497, 163875), (525, 155135), (575, 141645), (665, 122475), (805, 101175), (875, 93081), (1065, 76475), (1311, 62125), (1349, 60375), (1425, 57155), (1491, 54625), (1633, 49875), (1725, 47215), (1775, 45885), (1995, 40825), (2185, 37275), (2375, 34293), (2415, 33725), (2485, 32775), (2625, 31027), (2875, 28329), (3059, 26625), (3325, 24495), (4025, 20235), (4047, 20125), (4899, 16625), (5325, 15295), (6555, 12425), (6745, 12075), (7125, 11431), (7455, 10925), (8165, 9975), (8625, 9443), (8875, 9177)]