21508380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{331}}^1$

素因数の和:384

約数の個数: 108

約数和(自身を含む): 69064632

約数和(自身を除く): 47556252

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 331, 342, 361, 380, 570, 662, 684, 722, 855, 993, 1083, 1140, 1324, 1444, 1655, 1710, 1805, 1986, 2166, 2979, 3249, 3310, 3420, 3610, 3972, 4332, 4965, 5415, 5958, 6289, 6498, 6620, 7220, 9930, 10830, 11916, 12578, 12996, 14895, 16245, 18867, 19860, 21660, 25156, 29790, 31445, 32490, 37734, 56601, 59580, 62890, 64980, 75468, 94335, 113202, 119491, 125780, 188670, 226404, 238982, 283005, 358473, 377340, 477964, 566010, 597455, 716946, 1075419, 1132020, 1194910, 1433892, 1792365, 2150838, 2389820, 3584730, 4301676, 5377095, 7169460, 10754190, 21508380]

約数ペア:

[(1, 21508380), (2, 10754190), (3, 7169460), (4, 5377095), (5, 4301676), (6, 3584730), (9, 2389820), (10, 2150838), (12, 1792365), (15, 1433892), (18, 1194910), (19, 1132020), (20, 1075419), (30, 716946), (36, 597455), (38, 566010), (45, 477964), (57, 377340), (60, 358473), (76, 283005), (90, 238982), (95, 226404), (114, 188670), (171, 125780), (180, 119491), (190, 113202), (228, 94335), (285, 75468), (331, 64980), (342, 62890), (361, 59580), (380, 56601), (570, 37734), (662, 32490), (684, 31445), (722, 29790), (855, 25156), (993, 21660), (1083, 19860), (1140, 18867), (1324, 16245), (1444, 14895), (1655, 12996), (1710, 12578), (1805, 11916), (1986, 10830), (2166, 9930), (2979, 7220), (3249, 6620), (3310, 6498), (3420, 6289), (3610, 5958), (3972, 5415), (4332, 4965)]