21380220

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{137}}^1$

素因数の和:189

約数の個数: 144

約数和(自身を含む): 71174880

約数和(自身を除く): 49794660

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 30, 34, 36, 45, 51, 54, 60, 68, 85, 90, 102, 108, 135, 137, 153, 170, 180, 204, 255, 270, 274, 289, 306, 340, 411, 459, 510, 540, 548, 578, 612, 685, 765, 822, 867, 918, 1020, 1156, 1233, 1370, 1445, 1530, 1644, 1734, 1836, 2055, 2295, 2329, 2466, 2601, 2740, 2890, 3060, 3468, 3699, 4110, 4335, 4590, 4658, 4932, 5202, 5780, 6165, 6987, 7398, 7803, 8220, 8670, 9180, 9316, 10404, 11645, 12330, 13005, 13974, 14796, 15606, 17340, 18495, 20961, 23290, 24660, 26010, 27948, 31212, 34935, 36990, 39015, 39593, 41922, 46580, 52020, 62883, 69870, 73980, 78030, 79186, 83844, 104805, 118779, 125766, 139740, 156060, 158372, 197965, 209610, 237558, 251532, 314415, 356337, 395930, 419220, 475116, 593895, 628830, 712674, 791860, 1069011, 1187790, 1257660, 1425348, 1781685, 2138022, 2375580, 3563370, 4276044, 5345055, 7126740, 10690110, 21380220]

約数ペア:

[(1, 21380220), (2, 10690110), (3, 7126740), (4, 5345055), (5, 4276044), (6, 3563370), (9, 2375580), (10, 2138022), (12, 1781685), (15, 1425348), (17, 1257660), (18, 1187790), (20, 1069011), (27, 791860), (30, 712674), (34, 628830), (36, 593895), (45, 475116), (51, 419220), (54, 395930), (60, 356337), (68, 314415), (85, 251532), (90, 237558), (102, 209610), (108, 197965), (135, 158372), (137, 156060), (153, 139740), (170, 125766), (180, 118779), (204, 104805), (255, 83844), (270, 79186), (274, 78030), (289, 73980), (306, 69870), (340, 62883), (411, 52020), (459, 46580), (510, 41922), (540, 39593), (548, 39015), (578, 36990), (612, 34935), (685, 31212), (765, 27948), (822, 26010), (867, 24660), (918, 23290), (1020, 20961), (1156, 18495), (1233, 17340), (1370, 15606), (1445, 14796), (1530, 13974), (1644, 13005), (1734, 12330), (1836, 11645), (2055, 10404), (2295, 9316), (2329, 9180), (2466, 8670), (2601, 8220), (2740, 7803), (2890, 7398), (3060, 6987), (3468, 6165), (3699, 5780), (4110, 5202), (4335, 4932), (4590, 4658)]