21320280

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1039}}^1$

素因数の和:1078

約数の個数: 128

約数和(自身を含む): 74880000

約数和(自身を除く): 53559720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 27, 30, 36, 38, 40, 45, 54, 57, 60, 72, 76, 90, 95, 108, 114, 120, 135, 152, 171, 180, 190, 216, 228, 270, 285, 342, 360, 380, 456, 513, 540, 570, 684, 760, 855, 1026, 1039, 1080, 1140, 1368, 1710, 2052, 2078, 2280, 2565, 3117, 3420, 4104, 4156, 5130, 5195, 6234, 6840, 8312, 9351, 10260, 10390, 12468, 15585, 18702, 19741, 20520, 20780, 24936, 28053, 31170, 37404, 39482, 41560, 46755, 56106, 59223, 62340, 74808, 78964, 93510, 98705, 112212, 118446, 124680, 140265, 157928, 177669, 187020, 197410, 224424, 236892, 280530, 296115, 355338, 374040, 394820, 473784, 533007, 561060, 592230, 710676, 789640, 888345, 1066014, 1122120, 1184460, 1421352, 1776690, 2132028, 2368920, 2665035, 3553380, 4264056, 5330070, 7106760, 10660140, 21320280]

約数ペア:

[(1, 21320280), (2, 10660140), (3, 7106760), (4, 5330070), (5, 4264056), (6, 3553380), (8, 2665035), (9, 2368920), (10, 2132028), (12, 1776690), (15, 1421352), (18, 1184460), (19, 1122120), (20, 1066014), (24, 888345), (27, 789640), (30, 710676), (36, 592230), (38, 561060), (40, 533007), (45, 473784), (54, 394820), (57, 374040), (60, 355338), (72, 296115), (76, 280530), (90, 236892), (95, 224424), (108, 197410), (114, 187020), (120, 177669), (135, 157928), (152, 140265), (171, 124680), (180, 118446), (190, 112212), (216, 98705), (228, 93510), (270, 78964), (285, 74808), (342, 62340), (360, 59223), (380, 56106), (456, 46755), (513, 41560), (540, 39482), (570, 37404), (684, 31170), (760, 28053), (855, 24936), (1026, 20780), (1039, 20520), (1080, 19741), (1140, 18702), (1368, 15585), (1710, 12468), (2052, 10390), (2078, 10260), (2280, 9351), (2565, 8312), (3117, 6840), (3420, 6234), (4104, 5195), (4156, 5130)]