21178920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1327}}^1$

素因数の和:1367

約数の個数: 128

約数和(自身を含む): 76492800

約数和(自身を除く): 55313880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 19, 20, 21, 24, 28, 30, 35, 38, 40, 42, 56, 57, 60, 70, 76, 84, 95, 105, 114, 120, 133, 140, 152, 168, 190, 210, 228, 266, 280, 285, 380, 399, 420, 456, 532, 570, 665, 760, 798, 840, 1064, 1140, 1327, 1330, 1596, 1995, 2280, 2654, 2660, 3192, 3981, 3990, 5308, 5320, 6635, 7962, 7980, 9289, 10616, 13270, 15924, 15960, 18578, 19905, 25213, 26540, 27867, 31848, 37156, 39810, 46445, 50426, 53080, 55734, 74312, 75639, 79620, 92890, 100852, 111468, 126065, 139335, 151278, 159240, 176491, 185780, 201704, 222936, 252130, 278670, 302556, 352982, 371560, 378195, 504260, 529473, 557340, 605112, 705964, 756390, 882455, 1008520, 1058946, 1114680, 1411928, 1512780, 1764910, 2117892, 2647365, 3025560, 3529820, 4235784, 5294730, 7059640, 10589460, 21178920]

約数ペア:

[(1, 21178920), (2, 10589460), (3, 7059640), (4, 5294730), (5, 4235784), (6, 3529820), (7, 3025560), (8, 2647365), (10, 2117892), (12, 1764910), (14, 1512780), (15, 1411928), (19, 1114680), (20, 1058946), (21, 1008520), (24, 882455), (28, 756390), (30, 705964), (35, 605112), (38, 557340), (40, 529473), (42, 504260), (56, 378195), (57, 371560), (60, 352982), (70, 302556), (76, 278670), (84, 252130), (95, 222936), (105, 201704), (114, 185780), (120, 176491), (133, 159240), (140, 151278), (152, 139335), (168, 126065), (190, 111468), (210, 100852), (228, 92890), (266, 79620), (280, 75639), (285, 74312), (380, 55734), (399, 53080), (420, 50426), (456, 46445), (532, 39810), (570, 37156), (665, 31848), (760, 27867), (798, 26540), (840, 25213), (1064, 19905), (1140, 18578), (1327, 15960), (1330, 15924), (1596, 13270), (1995, 10616), (2280, 9289), (2654, 7980), (2660, 7962), (3192, 6635), (3981, 5320), (3990, 5308)]