21111720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{613}}^1$

素因数の和:675

約数の個数: 128

約数和(自身を含む): 74269440

約数和(自身を除く): 53157720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 41, 42, 56, 60, 70, 82, 84, 105, 120, 123, 140, 164, 168, 205, 210, 246, 280, 287, 328, 410, 420, 492, 574, 613, 615, 820, 840, 861, 984, 1148, 1226, 1230, 1435, 1640, 1722, 1839, 2296, 2452, 2460, 2870, 3065, 3444, 3678, 4291, 4305, 4904, 4920, 5740, 6130, 6888, 7356, 8582, 8610, 9195, 11480, 12260, 12873, 14712, 17164, 17220, 18390, 21455, 24520, 25133, 25746, 34328, 34440, 36780, 42910, 50266, 51492, 64365, 73560, 75399, 85820, 100532, 102984, 125665, 128730, 150798, 171640, 175931, 201064, 251330, 257460, 301596, 351862, 376995, 502660, 514920, 527793, 603192, 703724, 753990, 879655, 1005320, 1055586, 1407448, 1507980, 1759310, 2111172, 2638965, 3015960, 3518620, 4222344, 5277930, 7037240, 10555860, 21111720]

約数ペア:

[(1, 21111720), (2, 10555860), (3, 7037240), (4, 5277930), (5, 4222344), (6, 3518620), (7, 3015960), (8, 2638965), (10, 2111172), (12, 1759310), (14, 1507980), (15, 1407448), (20, 1055586), (21, 1005320), (24, 879655), (28, 753990), (30, 703724), (35, 603192), (40, 527793), (41, 514920), (42, 502660), (56, 376995), (60, 351862), (70, 301596), (82, 257460), (84, 251330), (105, 201064), (120, 175931), (123, 171640), (140, 150798), (164, 128730), (168, 125665), (205, 102984), (210, 100532), (246, 85820), (280, 75399), (287, 73560), (328, 64365), (410, 51492), (420, 50266), (492, 42910), (574, 36780), (613, 34440), (615, 34328), (820, 25746), (840, 25133), (861, 24520), (984, 21455), (1148, 18390), (1226, 17220), (1230, 17164), (1435, 14712), (1640, 12873), (1722, 12260), (1839, 11480), (2296, 9195), (2452, 8610), (2460, 8582), (2870, 7356), (3065, 6888), (3444, 6130), (3678, 5740), (4291, 4920), (4305, 4904)]