21065700

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:154

約数の個数: 144

約数和(自身を含む): 65995776

約数和(自身を除く): 44930076

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 25, 30, 43, 46, 50, 60, 69, 71, 75, 86, 92, 100, 115, 129, 138, 142, 150, 172, 213, 215, 230, 258, 276, 284, 300, 345, 355, 426, 430, 460, 516, 575, 645, 690, 710, 852, 860, 989, 1065, 1075, 1150, 1290, 1380, 1420, 1633, 1725, 1775, 1978, 2130, 2150, 2300, 2580, 2967, 3053, 3225, 3266, 3450, 3550, 3956, 4260, 4300, 4899, 4945, 5325, 5934, 6106, 6450, 6532, 6900, 7100, 8165, 9159, 9798, 9890, 10650, 11868, 12212, 12900, 14835, 15265, 16330, 18318, 19596, 19780, 21300, 24495, 24725, 29670, 30530, 32660, 36636, 40825, 45795, 48990, 49450, 59340, 61060, 70219, 74175, 76325, 81650, 91590, 97980, 98900, 122475, 140438, 148350, 152650, 163300, 183180, 210657, 228975, 244950, 280876, 296700, 305300, 351095, 421314, 457950, 489900, 702190, 842628, 915900, 1053285, 1404380, 1755475, 2106570, 3510950, 4213140, 5266425, 7021900, 10532850, 21065700]

約数ペア:

[(1, 21065700), (2, 10532850), (3, 7021900), (4, 5266425), (5, 4213140), (6, 3510950), (10, 2106570), (12, 1755475), (15, 1404380), (20, 1053285), (23, 915900), (25, 842628), (30, 702190), (43, 489900), (46, 457950), (50, 421314), (60, 351095), (69, 305300), (71, 296700), (75, 280876), (86, 244950), (92, 228975), (100, 210657), (115, 183180), (129, 163300), (138, 152650), (142, 148350), (150, 140438), (172, 122475), (213, 98900), (215, 97980), (230, 91590), (258, 81650), (276, 76325), (284, 74175), (300, 70219), (345, 61060), (355, 59340), (426, 49450), (430, 48990), (460, 45795), (516, 40825), (575, 36636), (645, 32660), (690, 30530), (710, 29670), (852, 24725), (860, 24495), (989, 21300), (1065, 19780), (1075, 19596), (1150, 18318), (1290, 16330), (1380, 15265), (1420, 14835), (1633, 12900), (1725, 12212), (1775, 11868), (1978, 10650), (2130, 9890), (2150, 9798), (2300, 9159), (2580, 8165), (2967, 7100), (3053, 6900), (3225, 6532), (3266, 6450), (3450, 6106), (3550, 5934), (3956, 5325), (4260, 4945), (4300, 4899)]