28706040

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{659}}^1$

素因数の和:698

約数の個数: 144

約数和(自身を含む): 102702600

約数和(自身を除く): 73996560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 55, 60, 66, 72, 88, 90, 99, 110, 120, 121, 132, 165, 180, 198, 220, 242, 264, 330, 360, 363, 396, 440, 484, 495, 605, 659, 660, 726, 792, 968, 990, 1089, 1210, 1318, 1320, 1452, 1815, 1977, 1980, 2178, 2420, 2636, 2904, 3295, 3630, 3954, 3960, 4356, 4840, 5272, 5445, 5931, 6590, 7249, 7260, 7908, 8712, 9885, 10890, 11862, 13180, 14498, 14520, 15816, 19770, 21747, 21780, 23724, 26360, 28996, 29655, 36245, 39540, 43494, 43560, 47448, 57992, 59310, 65241, 72490, 79080, 79739, 86988, 108735, 118620, 130482, 144980, 159478, 173976, 217470, 237240, 239217, 260964, 289960, 318956, 326205, 398695, 434940, 478434, 521928, 637912, 652410, 717651, 797390, 869880, 956868, 1196085, 1304820, 1435302, 1594780, 1913736, 2392170, 2609640, 2870604, 3189560, 3588255, 4784340, 5741208, 7176510, 9568680, 14353020, 28706040]

約数ペア:

[(1, 28706040), (2, 14353020), (3, 9568680), (4, 7176510), (5, 5741208), (6, 4784340), (8, 3588255), (9, 3189560), (10, 2870604), (11, 2609640), (12, 2392170), (15, 1913736), (18, 1594780), (20, 1435302), (22, 1304820), (24, 1196085), (30, 956868), (33, 869880), (36, 797390), (40, 717651), (44, 652410), (45, 637912), (55, 521928), (60, 478434), (66, 434940), (72, 398695), (88, 326205), (90, 318956), (99, 289960), (110, 260964), (120, 239217), (121, 237240), (132, 217470), (165, 173976), (180, 159478), (198, 144980), (220, 130482), (242, 118620), (264, 108735), (330, 86988), (360, 79739), (363, 79080), (396, 72490), (440, 65241), (484, 59310), (495, 57992), (605, 47448), (659, 43560), (660, 43494), (726, 39540), (792, 36245), (968, 29655), (990, 28996), (1089, 26360), (1210, 23724), (1318, 21780), (1320, 21747), (1452, 19770), (1815, 15816), (1977, 14520), (1980, 14498), (2178, 13180), (2420, 11862), (2636, 10890), (2904, 9885), (3295, 8712), (3630, 7908), (3954, 7260), (3960, 7249), (4356, 6590), (4840, 5931), (5272, 5445)]